Mauricio & Lessa.

O EXERCITO DOS ESTADOS UNIDOS; Biblioteca Militar Volume XLIII (Used)

Ordnance Dept.

O.P.M. 8-15 AMMUNITION COMPONENT TESTS BOOSTERS; Ordnancs Proof Manual (Used)

Costley,Bill.

OBERGEFREITER JAGER BATTALION LIGHT INFANTRY DIVISION. (Used)

Costley,Bill.

OBERSCHARFUHRER 6.SS-GEBIRGS DIVISION NORD. (Used)

Bureau of Ordnance.

OD 6662 ORDNANCE EQUIPMENT LIST FOR CARGO SHIPS AKA (ARTIC). (Used)

Ordnance Dept.

OEC LIST OF ORDNANCE CHARTS. (Used)

Stefanski, Claus P., & Dirk Stefanski .

OFFICER SWORDS OF THE GERMAN NAVY 1806-1945.

National Board for the Promotion of Rifle Practice.

OFFICIAL BULLETINS NATIONAL TROPHY MATCHES 1962. (Used)

Engineer Regiment.

THE OFFICIAL HISTORY OF THE THREE HUNDRED AND FOURTH ENGINEER REGIMENT. (Used)

Cooper,General S.

OFFICIAL REPORT OF THE BATTLE OF CHICKMAUGA. (Used)

Christian,G.L.

OFFICIAL REPORT OF THE HISTORY COMMITTE OF THE GRAND CAMP C.V.,DEPARTMENT OF VIRGINIA. (Used)

Christan,G.L.

OFFICIAL REPORT OF THE HISTORY COMMITTEE OF THE GRAND CAMP,C.V. DEPARTMENT OF VIRGINIA. (Used)

Christian,G.L.

OFFICIAL REPORT OF THE HISTORY COMMITTEE OF THE GRAND CAMP,C.V.'DEPARTMENT OF VIRGINIA. (Used)

OFFICIAL WORLD'S FAIR IN PICTURES; A century of Progress Exposition 1933 (Used)

Ordnance Field Service.

OFS BULLETIN NO. 1990-7 IDENTIFYING NOMENCLATURE ON CAL..50 M2 AND CAL..30 METAL AMMUNITION BOXES. (Used)

Ordnance Field Service.

OFS TECHNICAL BULLETIN 1990-7IDENTIFYING NOMENCLATURE ON CAL. .50, M2, AND CAL..30 M1 METAL AMMUNITION BOXES. (Used)

War Dept.

OFSB 3-20 AMMUNITION: SURVEILLANCE MANUAL. (Used)

Ordnance Dept.

OFSC ORDNANCE FIELD SERVICE CIRCULARS, OFSC 1, 5, 8, 9, 13, 17 AND 20. (Used)

Ordnance Dept.

OGS1-1, 2-1, 3-1, 4-1, 5-1, 6-1 AND 8-1, OBOSOLETE MATERIAL, GROUPS A, B, C, D, E, D, AND MISCELLANEOUS ITEMS. (Used)

Robert N. Converse.

OHIO FLINT TYPES. (Used)

Donald A. Hutslar.

OHIO GUNSMITHS & ALLIED TRADESMEN 1750-1950 VOLUME 2. (Used)

Donald A. Hutslar.

OHIO GUNSMITHS & ALLIED TRADESMEN 1750-1950 VOLUME 3. (Used)

Donald A. Hutslar.

OHIO GUNSMITHS & ALLIED TRADESMEN 1750-1950 VOLUME 5. (Used)

Robert S. Harper.

OHIO HANDBOOK OF THE CIVIL WAR. (Used)

James B. Whisker.

OHIO LONG RIFLES VOL. I. (Used)