Electrical resistivity map of Southern Scotland - apparent resistivities for a depth of 500 feet / 
Edge, Arthur Bernard Broughton.
British Electrical and Allied Industries Research Association.
J. Bartholomew & Son Ltd.
[London] :  The British Electrical and Allied Industries Research Association, 
[1934]
Produced by J. Bartholomew & Son Ltd.
Print codes: B34 ; 893.
In Bartholomew archive vol. Apr.-Oct. 1934.
E.R.A. ref. M/T33.