My country 'tis of thee.
Contributors: Bowman, Eleanor. joint author.; Phelps, Mary. joint author.
Publisher: The Macmillan company
Published: 1940
Place of publication: New York
Language: eng
Number of pages: 335
Subjects: Natural resources.; Agriculture -- United States.; Soil conservation -- United States.; Coal mines and mining -- United States.; Petroleum industry and trade -- United States.; Conservation of natural resources.; United States -- Economic conditions.
Notes: Bibliography: p. 323-327.