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Front Matter

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Table of Contents

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Pollution and Evolution
David J. Merrell

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Myxobacterial Columns
Walter Fluegel

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Protein Patterns of Dragonfly Hemolymph as Shown by Gel Disc Electrophoresis
Myron Anderson, Lee Halgren, and Louis Nuti

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Mayfly Cholinesterase: Solubilization and Partial Purification
Burton C. Lidgerding and Donald J. Kraft

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Anabaenopsis Raciborskii Woloszynska in Minnesota Lakes
Hibbert Hill

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Rest Site Selection by Radio-tagged Raccoons
Jay H. Schnell

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Waterfowl Production in a Selected Wetland Management Area
Orlo A. Quame and Alfred H. Grewe Jr.

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Germinability Factors of Field-Grown Sorghum Seed
D. B. Sauer and C. M. Christensen

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Lead Absorption From Soil Into Legumes
Marie H. Berg

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Physicalism and Humanism
Robert Sheehan

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Migration and Social Status
D. Duane Braun

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Cost Analysis of Some Differential Staffing Plans
Duan I. Budde

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Some Computer and Isodensitracer Applications in Geography
Avi Degani

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The Challenge of Historical Geography
Louis Seig

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United Nations Techniques in the Middle East
W. Hartley Clark

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Lead-Poisoning From Environmental Contamination
A. Karim Ahmed, George Bloom, and Clifford A. Ottaway

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Back Matter