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  1. ↑ Murphy, E. J.; Morgan, S. O. "The Dielectric Properties of Insulating Materials" (PDF). Dicapai October 2, 2012. 
  2. ↑ Tilden, William Augustus (2009). A Short History of the Progress of Scientific Chemistry in Our Own Times. BiblioBazaar, LLC. m/s. 249. ISBN 1-103-35842-1. 
  3. ↑ Henshaw, D. G.; Hurst, D. G.; Pope, N. K. (1953). "Structure of Liquid Nitrogen, Oxygen, and Argon by Neutron Diffraction". Physical Review. 92: 1229. Bibcode:1953PhRv...92.1229H. doi:10.1103/PhysRev.92.1229. 
  4. ↑ DATA BOOK for Cryogenic Gases and Equipment. aspenycap.org
  5. ↑ Umrath, W. (1974). "Cooling bath for rapid freezing in electron microscopy". Journal of Microscopy. 101: 103–105. doi:10.1111/j.1365-2818.1974.tb03871.x. 
  6. ↑ British Compressed Gases Association (2000) BCGA Code of Practice CP30. The Safe Use of Liquid nitrogen Dewars up to 50 litres. Error in webarchive template: Check |url= value. Empty. ISSN 0260-4809.
  7. ↑ Confined Space Entry - Worker and Would-be Rescuer Asphyxiated, Valero Refinery Asphyxiation Incident Case Study.
  8. ↑ Inquiry after man dies in chemical leak, BBC News, October 25, 1999.
  9. ↑ Liquid Nitrogen – Code of practice for handling. United Kingdom: Birkbeck, University of London. 2007. Dicapai 2012-02-08. 

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