TY  - BOOK
AU  - McLennan,John Cunningham
TI  - Report on some sources of helium in the British empire,
AV  - TN26 .A35 no. 31
PY  - 1920///
CY  - Ottawa
PB  - J. de L. Taché, printer
KW  - Helium
N1  - At head of title:  Canada.  Department of mines
ER  -