Employment and related statistics of mines and quarries, 1935.
Contributors: Tryon, F. G. 1892-1940; National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.); United States. Bureau of Mines; United States. Bureau of the Census
Series: Mineral technology and output per man studies -- report no. E-4
Publisher: Works Progress Administration, National Research Project and Dept. of the Interior, Bureau of Mines; Dept. of Commerce, Bureau of the Census
Published: 1937
Place of publication: Philadelphia, Pa
Language: eng
Number of pages: 133
Subjects: Miners -- Employment -- United States -- Statistics.; Coal mines and mining -- Employment -- United States -- Statistics.
Other titles: Coal.
Notes: Cover title: Coal.

"July 1937."

Includes bibliographical references.
Table of contents: value: pt. I. Bituminous coal / by F.G. Tryon ... [et al.]; value: pt. II. Pennsylvania anthracite / by F.G. Tryon ... [et al.].