Gilbert, Miriam, Starting a rock and mineral collection.Illustrated by Walter Ferguson [and others] - Maplewood, N. J., C. S. Hammond (c)1961. - 47 pages illustrations 26 cm. Includes bibliographical references. LCCN: 61017403 Subjects--Topical Terms: Minerals--Collection and preservation.Rocks. LC Class. No.: QE50 / .S737 1961 QE50