Articles
Lichen Deterioration About a Coal-Fired Steam Electric Generating Plant
Elmer L. Schmidt and R. J. Zeyen
Till Fabrics and Pedoturbations In Some Soils of Minnesota
Gerald W. McCormick
Nesting and Brood Rearing Habitat of The Upland Sandpiper
John C. Dorio and Alfred H. Grewe
Hierarchy, Systems, and Geography
Gerald R. Pitzl
Interplanetary Magnetic Field Sector Polarity and Neuropsychiatric Adaption: a Reanalysis
Hans W. Wendt
Lake Itasca State Park Myxomycetes: An Annotated Checklist
M. E. Palm, E. L. Stewart, and E. F. Haskins