"webster, robert . "
"gems:their sources,descriptions and identifications: / robert.. webster" - 3 ed. - london : butterworths 1975. - "xviii, 938p.; 26 cm."
0 408 70573 6 hard cover
precious stones-description--
553. 8 web
"gems:their sources,descriptions and identifications: / robert.. webster" - 3 ed. - london : butterworths 1975. - "xviii, 938p.; 26 cm."
0 408 70573 6 hard cover
precious stones-description--
553. 8 web