Balloon control
Grishin, P F
Balloon control - Oldham: Platt Bros Ltd, 1956 - 73p.
Balloon
Collapsing balloon
629.132.1-50 / J6
Balloon control - Oldham: Platt Bros Ltd, 1956 - 73p.
Balloon
Collapsing balloon
629.132.1-50 / J6