புரொப்பேன் (Tamil Wikipedia)

Analysis of information sources in references of the Wikipedia article "புரொப்பேன்" in Tamil language version.

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books.google.com

Propane Education; Research Council. "History of Propane". Archived from the original on 1 November 2010. Retrieved 22 May 2012. {{cite web}}: Unknown parameter |lastauthoramp= ignored (help)

National Propane Gas Association. "The History of Propane". Archived from the original on January 11, 2011. Retrieved 2007-12-22.
"The First Fifty Years of LP-Gas: An Industry Chronology" (PDF). LPGA Times. January 1962 இம் மூலத்தில் இருந்து 2006-10-07 அன்று. பரணிடப்பட்டது.. https://web.archive.org/web/20061007140419/http://www.npga.org/files/public/LPGA_Times_1962_History.pdf , Page 17.
Propane Education; Research Council. "Fact Sheet – The History of Propane". Archived from the original on February 16, 2004. Retrieved 2007-12-22. {{cite web}}: Unknown parameter |lastauthoramp= ignored (help)
Propane Education; Research Council. "History of Propane". Archived from the original on 1 November 2010. Retrieved 22 May 2012. {{cite web}}: Unknown parameter |lastauthoramp= ignored (help)