A field guide to Australian opals /
Barrie O'Leary.
APA Citation
O'Leary, B. (1977). A field guide to Australian opals. Adelaide: Rigby.
MLA Citation
O'Leary, Barrie, 1940-. A Field Guide to Australian Opals. Adelaide: Rigby, 1977.
Warning: These citations may not always be complete (especially for serials).