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david j voegtlin
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Catalog of the Cinara species of North America (Homoptera: Aphididae)
David J. Voegtlin · Illinois Natural History Survey
55 sayfa · 1988
Aphids / Cinara / Pucerons / Classification / Verzeichnis
Invertebrates of the H.J. Andrews Experimental Forest, western Cascade Mountains, Oregon
David J. Voegtlin · Forest Research Laboratory, School of Forestry, Oregon State University
29 sayfa · 1982
Arthropoda / Diseases and pests / Douglas fir / H.J. Andrews Experimental Forest (Or.) / Statistics