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Annual report of research and technologic work on coal :fiscal year 1951
Annual report of research and technologic work on coal and related investigations :fiscal year 1952
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Published Year
1950-1959 (2)
Subject
Coal--Research (2)
Coal--United States (2) *
Author
Brown, R. L. (2) *
Carmann, E. P. (1)
Ode, W. H. (1)
