Willman, H. B., Reynolds, R. R., & Herbert, P. (1946). Geological aspects of prospecting: And areas for prospecting in the zinc-lead district of northwestern Illinois. [publisher not identified].
Chicago Style (17th ed.) CitationWillman, H. B., Robert Ramon Reynolds, and Paul Herbert. Geological Aspects of Prospecting: And Areas for Prospecting in the Zinc-lead District of Northwestern Illinois. Urbana, Ill.: [publisher not identified], 1946.
MLA (9th ed.) CitationWillman, H. B., et al. Geological Aspects of Prospecting: And Areas for Prospecting in the Zinc-lead District of Northwestern Illinois. [publisher not identified], 1946.
Warning: These citations may not always be 100% accurate.