This consignment comprises three aerial photo maps - 

PD1017 - Lake Gnangara 
PD1018 - Mulga Downs
PD1019 - Jaffre/Wittenoom Gorge.

The first item is a complete enlarged photograph of the area, whilst items two and three are constructed of a complex line overlap system.
 
Administrative information
 
The following data was keyed from the paper documentation:
Form number:              CA 17
Creating department:      Department Civil Aviation
Transferring department:  Department of Civil Aviation, Western                           Australian, Registry
Date of transfer:         16 December 1971
Archives file number:     RWP12/1/62