Airborne Radar Sounding of the Greenland Ice Sheet
Pawlowicz, Edmund F. (1972-09)
Radar sounding is a technique used in recent years to determine the thickness of ice sheets and glaciers. A radar signal is transmitted through ice, a dielectric, is reflected from the bottom, and is received at some time ...
Ohio's Burley Tobacco Agriculture : a Primary Regional Cash Crop
Jencks, W. Robert (1972-09)
Ohio's Burley tobacco agriculture is concentrated in a relatively small portion of southern Ohio and is significant as a primary cash crop for the region. In four of the 10 leading Burley-tobacco-producing counties, Burley ...
Yoked Control Versus Random Reinforcement : a Comparison of Experimental Designs
Hoover, Thomas O.; Deitchman, Robert (1972-09)
In verbal-conditioning studies, difficulty has been encountered in providing a control group with noncontingent reinforcement. Because randomly providing reinforcements to controls has proved unsatisfactory, Harmatz and ...
Avian Cholera in a Bald Eagle from Ohio
Locke, L. N.; Newman, J. A.; Mulhern, B. M. (1972-09)
Avian cholera (Pasteurella multocida) infection was diagnosed in an adult male bald eagle (Haliaeetus leucocephalus) collected in Ohio. Brain levels of organochlorine pesticides were found to be well below the reported ...
A New Species of Agrilus from Arizona (Coleoptera: Buprestidae)
Knull, Josef N. (1972-09)
A new species, Agrilus heterothecae, collected from the foliage of wild sunflower (Heterotheca sp.) in southern Arizona, is described.