MIL-F-81334B (INTERIM AMENDMENT-1), MILITARY SPECIFICATION: FOAM, PLASTIC, FLEXIBLE, OPEN CELL POLYESTER TYPE, POLYURETHANE (01-APR-1991)
MIL-F-81334B (INTERIM AMENDMENT-1), MILITARY SPECIFICATION: FOAM, PLASTIC, FLEXIBLE, OPEN CELL POLYESTER TYPE, POLYURETHANE (01-APR-1991).