In Iowa, as elsewhere, natural geographic causes produce natural geographic effects. Most of our agricultural enterprises and many of our other industries are located chiefly with respect to these causes. Some non-geographic factors are also involved.
Proceedings of the Iowa Academy of Science
©1934 Iowa Academy of Science, Inc.
Smith, John E.
"Geographic Control of Industries in Iowa,"
Proceedings of the Iowa Academy of Science, 41(1), 239-239.
Available at: https://scholarworks.uni.edu/pias/vol41/iss1/68