Home / Reference Books / 1942 Aberbeen Proving Grounds OCS Graduation Book 1942 Aberbeen Proving Grounds OCS Graduation Book$35.00 Measures 9-1/4″ X 12-3/8″, 67 pages, cloth binding. Heavily illustrated, very good condition with tight binding. 1942 Aberbeen Proving Grounds OCS Graduation Book quantity Add to cart Item Number: 34122 Category: Reference Books