Comparative study of American and Mexican zinc ore conditions
Subtitle: the difference in cost of production
By: by Otto Ruhl
Series: Pamphlets in American history -- T 426
Publisher: publisher not identified
Published: 1979
Place of publication: Joplin? Mo.]
Language: eng
Number of pages: 15
Subjects: Zinc mines and mining; Economic conditions
Notes: Cover title.

Includes tables.

Microfiche. Sanford, N.C. : Microfilming Corp. of America, 1979. 1 sheet ; 11 x 15 cm. (Pamphlets in American history : Tariffs ; T 426)