Report on some sources of helium in the British empire,
McLennan, John Cunningham, 1867-
Report on some sources of helium in the British empire, by J. C. McLennan and associates. Pub. by permission of the British Admiralty. - Ottawa, J. de L. Taché, printer, 1920. - viii, 72 p. 4 fold. maps (in pocket) 25 cm.
At head of title: Canada. Department of mines.
gs 20000378
Helium.
TN26 / .A35 no. 31
Report on some sources of helium in the British empire, by J. C. McLennan and associates. Pub. by permission of the British Admiralty. - Ottawa, J. de L. Taché, printer, 1920. - viii, 72 p. 4 fold. maps (in pocket) 25 cm.
At head of title: Canada. Department of mines.
gs 20000378
Helium.
TN26 / .A35 no. 31