Gems of Shri Lanka.
Ariyaratna, D. H.
Gems of Shri Lanka. [Text] Ariyaratna, D. H. - 5th rev.ed. - Colombo Sri Lanka Association for the Advancement Science 1993 - xiv, 110 p. ill., col. 21 cm.
Gemology
338.278 / ARI
Gems of Shri Lanka. [Text] Ariyaratna, D. H. - 5th rev.ed. - Colombo Sri Lanka Association for the Advancement Science 1993 - xiv, 110 p. ill., col. 21 cm.
Gemology
338.278 / ARI