Eastern Europe

[Patricia and Jeff Harding]

My daughter, Katie Harding, has plans to work in Poland this summer, in
Krakow, in Environmental Toxicology. She just finished her undergraduate
education, with degrees in Biology and Entomology at Oregon State
University. Are there good field guides she should have, to insects,
lepidoptera, or general natural history, covering Poland, or Eastern Europe,
in English, or as a second choice, German?
Patricia and Jeff Harding