A BRIEF SUMMARY OF GEOMMOLOGICAL INSTRUMENT EVOLUTION = BREF RESUME DE L'EVOLUTION DES INSTRUMENTS UTILISES EN GEMMOLOGIELIDDICOAT RT JR.1981; J. GEMMOL. PROC. GEMMOL. ASSOC. G.B.; ISSN 0022-1252; GBR; DA. 1981; VOL. 17; NO 8; PP. 568-583; ILL.Article

DEVELOPMENTS AND HIGHLIGHTS AT GIA'S LAB IN LOS ANGELES.LIDDICOAT RT JR.1971; GEMS AND GEMOL; USA; 1971, VOL. 13, NUM. 0011, P. 354 A 362Miscellaneous

DEVELOPMENTS AND HIGHLIGHTS AT GIA'S LAB IN LOS ANGELES.LIDDICOAT RT JR.1971; GEMS AND GEMOL; USA; 1971,1972, VOL. 13, NUM. 0012, P. 382 A 388Miscellaneous

DEVELOPMENTS AND HIGHLIGHTS AT GIA'S LAB. IN LOS ANGELES.LIDDICOAT RT JR.1971; GEMS AND GEMOL; USA; 1971, VOL. 13, NUM. 0010, P. 315 A 324Miscellaneous

DEVELOPMENTS AND HIGHLIGHTS AT GIA'S LAB IN LOS ANGELESLIDDICOAT RT JR.1972; GEMS AND GEMOL.; U.S.A. ; 1972, VOL. 14, NUM. 0003, P. 86 A 94Serial Issue

DEVELOPMENTS AND HIGHLIGHTS AT GIA'S LAB IN LOS ANGELES.LIDDICOAT RT JR.1972; GEMS AND GEMOL; USA; 1972, VOL. 14, NUM. 0001, P. 18 A 28Miscellaneous

THE DIAMOND DICTIONARY. (FIRST EDITION).COPELAND LL; LIDDICOAT RT JR; BENSON LB JR et al.1960; GEOL.INST.AMERICA; USA; 1960, P. 1 A 317Miscellaneous