INVESTIGATION OF THE VULNERABILITY TO BALLISTIC ATTACK OF TWO T77 OSCILLATING TURRETS Open PDF Document Details Document Type Technical Report Publication Date Mar 04, 1957 Accession Number AD0131415 Entities People William B. Frye Tags DTIC Thesaurus Topics Ammunition Combat Vehicles Depression Elevation Fragmentation Fragmentation Grenades Governments Grenades Manufacturing Munitions Ordnance Laboratories Oscillation Photographs Projectiles Strain Gages Tank Turrets Vehicles