Liknande böcker
Log of the Wookey Hole Exploration Expedition: 1935
Bok av Graham Balcombe
Penelope Powell
A reprint of the privately-produced 1936 edition (with additional material) describing the early cave diving exploration of Wookey Hole Caves by Graham Balcombe, Penelope Powell and others using "e;hard hat"e; pump-fed diving equipment.