An essay upon the wheat-fly, and some species allied to it / by Asa Fitch.

Licence: Public Domain Mark

Credit: An essay upon the wheat-fly, and some species allied to it / by Asa Fitch. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)