A COMPUTER PROGRAM TO CONVERT RAW PB-U-TH ISOTOPE RATIOS TO BLANK-CORRECTED ISOTOPE RATIOS AND CONCENTRATIONS, WITH ASSOCIATED ERRORS AND ERROR-CORRELATIONS = PROGRAMME D'ORDINATEUR POUR CONVERTIR LES RAPPORTS ISOTOPIQUES BRUTS PB-U-TH EN RAPPORTS ET CONCENTRATIONS ISOTOPIQUES CORRIGES, AVEC LES ERREURS ASSOCIEES ET LES CORRELATIONS DES ERREURSLUDWIG KR.1982; OPEN-FILE REP. (U. S. GEOL. SURV. 1978); ISSN 0196-1497; USA; DA. 1982; 16;[; USGS/82-0820]Report

USER'S GUIDE TO DBATIB; A COMPUTER PROGRAM FOR OPERATIONS OF A MICROMASS ISOMASS 54E MASS-SPECTROMETER = GUIDE DE L'UTILISATEUR POUR DBATIB; PROGRAMME D'ORDINATEUR POUR LES OPERATIONS D'UN SPECTROMETRE DE MASSE MICROMASSE ISOMASSE 54-ELUDWIG KR.1982; OPEN-FILE REP. (U. S. GEOL. SURV. 1978); ISSN 0196-1497; USA; DA. 1982; 50;[; USGS/82-1079]Report

CALCULATION OF UNCERTAINTIES OF U-PB ISOTOPE DATALUDWIG KR.1980; EARTH PLANET. SCI. LETTERS; NLD; DA. 1980; VOL. 46; NO 2; PP. 212-220; BIBL. 4 REF.Article

EFFECT OF INITIAL RADIOACTIVE-DAUGHTER DESEQUILIBRIUM ON U-PB ISOTOPE APPARENT AGES OF YOUNG MINERALS.LUDWIG KR.1977; J. RES. U.S. GEOL. SURV.; U.S.A.; DA. 1977; VOL. 5; NO 6; PP. 663-667; BIBL. DISSEM.; 2 ILL.Article

URANIUM-LEAD ISOTOPE APPARENT AGES OF PITCHBLENDES, SHIRLEY BASIN, WYOMING.LUDWIG KR.sdIN: ROCKY MOUNTAIN ENERGY RESOUR. DISCOVERY DEV. 24TH ANNU. MEET. AM. ASSOC. PET. GEOL. 6TH ANNU. MEET. SOC. ECON. PALEONTOL. MINERAL.; ALBUQUERQUE, N.M.; 1975; S.L.; RESUME,, P. 21Miscellaneous

PRECAMBRIAN GEOLOGY OF THE CENTRAL MAZATZAL MOUNTAINS, ARIZONA (PART I) AND LEAD ISOTOPE HETEROGENEITY IN PRECAMBRIAN IGNEOUS FELDSPARS (PART II).LUDWIG KR.1974; DISSERT. ABSTR. INTERNATION., B; USA; RESUME,1974, VOL. 35, NUM. 0005, P. 2264Serial Issue

URANIUM-DAUGHTER MIGRATION AND U/PB ISOTOPE APPARENT AGES OF URANIUM ORES, SHIRLEY BASIN, WYOMING.LUDWIG KR.1978; ECON. GEOL.; U.S.A.; DA. 1978; VOL. 73; NO 1; PP. 29-49; BIBL. 23 REF.; 32 ILL.Article

TIMING OF URANIUM MINERALIZATION IN GAS HILLS AND CROOKS GAP DISTRICTS, WYOMING, AS INDICATED BY U-PB ISOTOPE APPARENT AGES.LUDWIG KR.1977; GEOL. SOC. AMER., ABSTR. PROGRAMS; U.S.A.; DA. 1977; VOL. 9; NO 7; PP. 1078-1079Conference Paper

LEAD ISOTOPE HETEROGENEITY IN IGNEOUS POTASSIUM FELDSPARS.LUDWIG KR; SILVER LT.1970; GEOL. SOC. AMER., ABSTR. PROGRAMS; USA; 1970(10), VOL. 2, NUM. 0007, P. 611Miscellaneous

JAMES BAY SPILLWAYS AND CONTROL STRUCTURES = DEVERSOIRS DE LA BAIE JAMES ET STRUCTURE DE CONTROLELUDWIG KR; OLIVE RT.1981; PROC. AM. SOC. CIV. ENG., J. ENERGY DIV.; USA; DA. 1981; VOL. 107; NO 2; PP. 183-198; BIBL. 9 REF.Article

JAMES BAY POWERHOUSES: LAYOUT AND DESIGN CRITERIALUDWIG KR; OLIVE RT.1980; PROC. AM. SOC. CIV. ENG., J. ENERGY DIV.; USA; DA. 1980; VOL. 106; NO 2; PP. 235-255; BIBL. 11 REF.Article

SAGACIOUS SCIENTIFIC SLEUTHING SOLVES SALTING SAGA = L'ORIGINE DE LA PECHBLENDE DES HALDES DE LA MINE DE MYSTERY SNIFFER EN UTAHCUNNINGHAM CG; LUDWIG KR.1980; ECON. GEOL.; ISSN 0361-0128; USA; DA. 1980; VOL. 75; NO 7; PP. 1109-1111; BIBL. 9 REF.; 1 TAB. ; TABL./ILL.Article

LEAD-ISOTOPE INHOMOGENEITY IN PRECAMBRIAN IGNEOUS K-FELDSPARS.LUDWIG KR; SILVER LT.1977; GEOCHIM. COSMOCHIM. ACTA; G.B.; DA. 1977; VOL. 41; NO 10; PP. 1457-1471; BIBL. 27 REF.; 11 ILL.Article

ABSOLUTE AGE OF DISSEMINATED URANINITE IN WHEELER BASIN, GRAND COUNTY COLORADO.LUDWIG KR; YOUNG EJ.1975; J. RES. U.S. GEOL. SURV.; U.S.A.; DA. 1975; VOL. 3; NO 6; PP. 747-751; BIBL. 13 REF.; 2 ILL.Article

URANIUM-LEAD ISOTOPE SYSTEMATICS AND APPARENT AGES OF ZIRCONS AND OTHER MINERALS IN PRECAMBRIAN GRANITIC ROCKS GRANITE MOUNTAINS, WYOMING.LUDWIG KR; STUCKLESS JS.1978; CONTRIB. MINERAL. PETROL.; GERM.; DA. 1978; VOL. 65; NO 3; PP. 243-254; BIBL. 1 P.; 16 ILL.; 4 ANAL.Article

URANIUM-LEAD APPARENT AGES OF URANIFEROUS SECONDARY SILICA AS A GUIDE FOR DESCRIBING URANIUM MOBILITYZIELINSKI RA; LUDWIG KR; LINDSEY DA et al.1977; GEOL. SURV. U.S.A., CIRC.; USA; DA. 1977; NO 753; PP. 39-40; BIBL. 3 REF.; 1 ILL.Conference Paper

RUBIDUM-STRONTIUM MINIMUM AGES OF SEDIMENTATION, URANIUM MINERALIZATION, AND PROVENANCE, MORRISON FORMATION (UPPER JURASSIC), GRANTS MINERAL BELT, NEW MEXICO. DISCUSSION. REPLY = AGES MINIMUM AU RUBIDIUM-STRONTIUM DE LA SEDIMENTATION, DE LA MINERALISATION EN URANIUM ET DE L'ORIGINE DE LA FORMATION MORRISON (JURASSIQUE SUPERIEUR), CEINTURE MINERALE GRANTS, NOUVEAU MEXIQUE. DISCUSSION ET REPONSELUDWIG KR; LEE MJ; BROOKINS DG et al.1980; AM. ASSOC. PET. GEOL. BULL.; ISSN 0002-7464; USA; DA. 1980; VOL. 64; NO 10; PP. 1718-1719; BIBL. 6 REF.Article

PLEISTOCENE APPARENT AGES BY U-PB AND U-SERIES METHODS FOR URANIUM ORE IN DAKOTA SANDSTONE NEAR GALLUP, NEW MEXICO.LUDWIG KR; SZABO BJ; GRANGER HC et al.1977; J. REV. U.S. GEOL. SURV.; U.S.A.; DA. 1977; VOL. 5; NO 6; PP. 609-672; BIBL. 13 REF.Article

U-PB AYES OF URANIFERONS OPALS AND IMPLICATIONS FOR THE HISTORY OF BERYLLIUM, FLUORINE, AND URANIUM MINERALIZATION AT SPOR MOUNTAIN, UTAHLUDWIG KR; LINDSEY DA; ZIELINSKI RA et al.1980; EARTH PLANET. SCI. LETTERS; NLD; DA. 1980; VOL. 46; NO 2; PP. 221-232; BIBL. 36 REF.Article