Helium refrigeration and liquefaction using a liquid hydrogen refrigerator for precooling /

Chicago citation style
Helium refrigeration and liquefaction using a liquid hydrogen refrigerator for precooling /. 1960. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/011419906. (Accessed December 17, 2018.)
APA citation style
(1960) Helium refrigeration and liquefaction using a liquid hydrogen refrigerator for precooling /. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/011419906
MLA citation style
Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/011419906>.
Note: These citations are programmatically generated and may be incomplete.