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＜図書＞
Output and productivity in the electric and gas utilities, 1899-1942 / {by} Jacob Martin Gould.
(Publications of the National Bureau of Economic Research, Inc ; no. 47)

出版者	New York : National Bureau of Economic Research
出版年	1946
大きさ	xi, {1}, 195 p. diagrs. 24 cm.
著者標目	Gould, Jacob Martin, 1915-
件　名	Electric utilities -- United States  全ての件名で検索 Gas industry -- United States  全ての件名で検索
一般注記	Without thesis note. Thesis (Ph. D.)-- Columbia University, 1946.

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