Volume 79, Number 3-4 (1972)
Issue cover date: December 1972
Front Matter
General Interest Articles
Philosophy of Environmental Regulation
Richard H. Stanley
Engineering Solutions to Environmental Problems
Richard B. Miller
Engineering Solutions to Recycling Problems
O. N. Carlson
Research
Automatic Recording of Conductance Titrations
George E. Knudson and David Langhus
Feasibility of Commercial Vegetable Production in Western Iowa as a Boost to Agricultural and Rural Development
M. LeRon Robbins and Kermit J. Hildahl
The Absorption of Chlorinated Hydrocarbon Insecticides by Frog Skin
Timothy O. Kaiser and Jewett Dunham
Notes on Snail Feeding Behavior of Anaxjunius (Drury): (Odonata)
D. W. Sievers and A. C. Haman
A Preliminary Stratigraphic Study of the Galena Group of Winneshiek County, Iowa
C. O. Levorson and A. J. Gerk
X-Ray Diffraction Analysis of the Pennsylvanian Clays of Mahaska County
Harold Dean Anderson
Spill Protection at Procter and Gamble's Iowa City Plant
H. E. Brown, W. S. Cameron, and R. G. Bennett
Back Matter
