Conservation of helium gas.
By: Hearings before the Committee on military affairs, House of representatives, Seventy-fifth Congress, first session, on H.R. 4415 and H.R. 7494. April 20, 21, 22, May 27, June 29, 30, and July 1, 1937.
Publisher: U.S. Govt. print. off.
Published: 1937
Place of publication: Washington
Language: eng
Number of pages: 194
Subjects: Helium
Notes: Lister Hill, chairman.