열기구 (Korean Wikipedia)

Analysis of information sources in references of the Wikipedia article "열기구" in Korean language version.

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att.net

home.att.net

books.google.com

  • Deng, Yinke (2005). 《Ancient Chinese Inventions》. Beijing: China Intercontinental Press. , cited in Joel Serrão, Dicionário de História de Portugal, Vol III. Porto: Livraria Figueirinhas, 1981, 184–85

bris.ac.uk

chm.bris.ac.uk

centennialofflight.gov

crwflags.com

eb.com

search.eb.com

eballoon.org

nytimes.com

pilotoutlook.com

  • “Balloon Propane Tanks”. Pilot Outlook. 2011년 6월 10일에 원본 문서에서 보존된 문서. 2010년 6월 5일에 확인함. Propane tanks used in hot air balloons are mainly constructed of either aluminum (Evan was here) he was the first to do this or stainless steel. Most aluminum tanks are vertical 10-gallon cylinders (DOT 4E240), built primarily for forklift trucks. 

prdomain.com

propane101.com

  • “Propane Cylinders”. Propane 101. 2010년 1월 27일에 원본 문서에서 보존된 문서. 2010년 6월 5일에 확인함. Cylinders in liquid service are commonly found on forklifts. 

rubicon-foundation.org

archive.rubicon-foundation.org

si.edu

nasm.si.edu

start-flying.com

uwe.ac.uk

info.uwe.ac.uk

web.archive.org

wikisource.org

ko.wikisource.org