Articles
Pollution and Evolution
David J. Merrell
Myxobacterial Columns
Walter Fluegel
Protein Patterns of Dragonfly Hemolymph as Shown by Gel Disc Electrophoresis
Myron Anderson, Lee Halgren, and Louis Nuti
Mayfly Cholinesterase: Solubilization and Partial Purification
Burton C. Lidgerding and Donald J. Kraft
Rest Site Selection by Radio-tagged Raccoons
Jay H. Schnell
Waterfowl Production in a Selected Wetland Management Area
Orlo A. Quame and Alfred H. Grewe Jr.
Germinability Factors of Field-Grown Sorghum Seed
D. B. Sauer and C. M. Christensen
Lead Absorption From Soil Into Legumes
Marie H. Berg
Physicalism and Humanism
Robert Sheehan
Migration and Social Status
D. Duane Braun
Cost Analysis of Some Differential Staffing Plans
Duan I. Budde
The Challenge of Historical Geography
Louis Seig
United Nations Techniques in the Middle East
W. Hartley Clark
Lead-Poisoning From Environmental Contamination
A. Karim Ahmed, George Bloom, and Clifford A. Ottaway