UNIVERSITY OF PENNSYLVANIA RADIOCARBON DATES. XVI.MICHAEL HN; RALPH EK.1974; RADIOCARBON; U.S.A.; 1974, VOL. 16, NUM. 0002, P. 198 A 218Serial Issue

INTRAMOLECULAR PROTON EXCHANGE IN AQUEOUS HISTAMINE. AN NMR METHOD FOR RESOLVING THE AMMONIUM AND IMIDAZOLE PROTON-EXCHANGE RATESRALPH EK; ATHERTON JN.1980; J. AM. CHEM. SOC.; ISSN 0002-7863; USA; DA. 1980; VOL. 102; NO 19; PP. 6184-6185; BIBL. DISSEM.Article

TWENTY-FIVE YEARS OF RADIOCARBON DATING.RALPH EK; MICHAEL HN.1974; AMER. SCIENTIST; USA; 1974, VOL. 62, NUM. 0005, P. 553 A 560Serial Issue

UNIVERSITY OF PENNSYLVANIA RADIOCARBON DATES 12.RALPH EK; MICHAEL HN.1969; RADIOCARBON; USA; 1969, VOL. 11, NUM. 0002, P. 469 A 481Miscellaneous

GENERAL DISCUSSION OF THE CAUSES OF THE C14/C12 VARIATIONS.RAMATY R; LAL D; RALPH EK et al.1970; PROC. NOBEL. SYMP.; 1970, VOL. 12, P. 607 A 612Miscellaneous

GENERAL DISCUSSION OF THE MAGNITUDE OF THE C14/C12 VARIATIONS.RALPH EK; SUESS HE; DAMON PE et al.1970; PROC. NOBEL SYMP.; 1970, VOL. 12, P. 327 A 333Miscellaneous

JERILDERIE.DOOLEY JC; GOURLAY AJ; HALL LR et al.1976; GEOL. SURV. NEW SOUTH WALES, MAP, 1:100000; AUSTRAL.; DA. 1976; NO SI55-14; PP. 1; 1 CART.Serial Issue