1.

図書
図書
1. Deep well drilling : the principles and practices of deep well drilling and a hand book of usefull information for the well driller
by Walter H. Jeffery
出版情報: Toledo, Ohio : Walter H. Jeffery, 1921
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2.

図書
図書
2. Coal
Supreme Commander for the Allied Powers
出版情報: 東京 : 日本図書センター, 1990
シリーズ名: History of the nonmilitary activities of the occupation of Japan, 1945-1951 = 日本占領GHQ正史 ; v. 45
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3.

図書
図書
3. Coal : its properties, analysis, classification, geology, extraction, uses and distribution. 2nd ed
by Elwood S. Moore
出版情報: New York : Wiley , London : Chapman & Hall, c1940
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