Geometroid Caterpillars of Northeastern and Appalachian Forests
By Wagner, David; Ferguson, Douglas; McCabe, Timothy; Reardon, Richard Forest Service, US Dept of Agriculture, 2001
Out of print and overpriced at Amazon here but Steve Nanz just left the following find: I wasn't aware that Wagner had a Geometroid caterpillar book but now that I know, I see that archive.org and hathitrust.org have it online. … Steve Nanz, 12 March, 2014
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