BLUE GOLD The Turquoise Story 

by M G Broman 

Paperback 

Collector's Reference and History. A wealth of information,  insight and knowledge from years of study and diligence

Revised 1975 Edition

Lots of photos; both color and black and white

Glue from the binding is starting to fail. No missing pages, but separation has started. Covers have wear and tear from age and storage