Volume 105, Number 4 (1998)

Issue cover date: December 1998

Front Matter

General Interest Article



Lithologic and Structural Interpretation of Gravity Data, Northeastern Iowa p. 145-151
Curtiss J. Hella and Richard L. Kellogg


Lack of Genetic Variation in Cytochrome bin a Population of Smooth Softshell Turtles p. 158-160
David W. Weisrock, Tamara S. Haselkorn, and Fredric J. Janzen

Science Education


Safety Issues and Iowa Science Teachers p. 152-157
Jack A. Gerlovich, Ed Wilson, and Rahul Parsa

Back Matter