1973 Coal Convention : May 6-9, Pittsburgh, Pa.

1973 Coal Convention : May 6-9 Pittsburgh Pa.

出版社：Wash. : [s.n.], 1973.

出版年：1973

作者：American Mining Congress.

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Proceedings of the ..., Oct. 9-10, 1973, Pittsburgh, Pa.

作者：Symposium on Noise
ISBN：￥1.90
出版社：Pittsburgh : Industrial Health Foundation, 1974
出版年：1974

Proceedings of the ..., Oct. 9-10, 1973, Pittsburgh, Pa.

作者：Symposium on Noise
出版社：Pittsburgh : Industrial Health Foundation, 1974
出版年：1974

1975 Coal Convention of the American mining Congress, Pittsburghm, Pa., May 4-7,1975

作者：American Mining Congress.
出版社：Wash., 1975
出版年：1975

Ash Utilization : proceedings of the Symposium, Pittsburgh, Pa., Mar. 13-14, 1973

作者：Ash Utilization Symposium
出版社：Wash. : US GPO, 1974.
出版年：1974

Selected papers from the SME Fall Meeting and Exhibit, Pittsburgh, Pa., Sept. 19-21, 1973

作者：American Institute of Mining and Metallurgical Engineers. Society of Mining Engineers.
出版社：N.Y. : AIME

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作者：American Institute of Electrical Engineers.
出版社：New York : American Institute of Electrical Engineers, 1958.
出版年：1958