Phosphate industry of U.S.
Contributors: Wright, Carroll Davidson, 1840-1909.; United States. Dept. of Labor.
Series: Labor Dept. Spec. Rpt. No. 6
Publisher: U.S. G.P.O.
Published: 1893
Place of publication: [Washington, D.C.]
Format: Microform
Subjects: Phosphate industry -- United States.