The rockhound and prospector's bible: A reference & study guide to rocks, minerals, gemstones & prospecting

by L. J Ettinger details (USA). (see also: eBook (Kindle)) details (United Kingdom). (see also: eBook (Kindle)) ISBN: 978-0-9614840-0-2 ISBN-10: 0-9614840-0-4 L.J. Ettinger · 1985