Description: Early Days of Plastic Propellant by Dick Doe, including reference to Groups C, D, F and G, German PoW's, Rocket motors, Aberporth, Larkhill, Westcott, ammonium perchlorate as oxidant, sodium nitrate, poly-isoButene binder, PolyStyrene in ply-alphaMethyl Styrene, 30 HP DC electric motors, Group B in use until 1941 and the demolition in 1950.
