@article{18228, note = {At head of title: State of Illinois...Dept. of registration and education...Division of the State geological survey...}, author = {Willman, H. B. and Reynolds, Robert Ramon, and Herbert, Paul,}, url = {http://library.usi.edu/record/18228}, title = {Geological aspects of prospecting and areas for prospecting in the zinc-lead district of northwestern Illinois,}, recid = {18228}, pages = {48 p.}, address = {Urbana, Ill.,}, year = {1946}, }