JAN-C-99, JOINT ARMY-NAVY SPECIFICATION: CEMENT, PETTMAN (31 OCT 1944)

JAN-C-99, JOINT ARMY-NAVY SPECIFICATION: CEMENT, PETTMAN (31 OCT 1944)., (ARMY NUMBER 250-11-8C AND NAVY NUMBER 52C34), This specification covers two types of cement: Type A, Pettman cement; Type B, modified Pettman cement.