Army Air Operations Pamphlet. no.4, (Chapter 3), supplement no.3. Carriage of Artillery Equipment by Air. Section 1, Q.F. 25 Ponder, Mark 2 Gun on Carriage … Maintenance Manual for the Ordnance, Q.F. 25 Ponder, Mark II and III on Carriage 25 Ponder, Mark I and Mounting Self-Propelled 25 Ponder, C, Mark … Kanon 25 Ponder. (9 Veld). IK 9 technical manual 25 ponder kanon : beschrijving, werking en onderhoud van het materieel en de munitie
