ID:DA06194817
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Robert Webster著 ; 砂川一郎監訳
全国宝石学協会 1980.10
Available at 10 libraries
Robert Webster
N.A.G. Press 1979 6th ed. / revised by E. Allan Jobbins
Available at 1 libraries
by Robert Webster
N.A.G. Press 1976 6th ed
Butterworths 1975 3rd edition
[N.A.G. Press] 1975
Butterworths 1970 2nd ed
Available at 4 libraries
Butterworths 1962
v. 1 , v. 2
Available at 3 libraries
by Robert Webster ; with revisions for American edition by Virginia V. Hinton
Gemological institute of America c1945 The Jeweler's library v. 5
