Zinc - lead occurrences near Mapleton, Huntingdon Co.

MLA

Pennsylvania State University. and Robert C. Smith. Zinc - lead occurrences near Mapleton, Huntingdon Co. University Park, [publisher not identified], 1971.

APA

Pennsylvania State University. & Smith, R. (1971). Zinc - lead occurrences near Mapleton, Huntingdon Co. University Park, [publisher not identified].

Chicago

Pennsylvania State University. and Robert C. Smith. Zinc - lead occurrences near Mapleton, Huntingdon Co. University Park, [publisher not identified], 1971.