Field Guide to the Flower Flies of Northeastern North AmericaJeffrey H Skevington, Michelle M. Locke, Andrew D. Young, Kevin Moran, William J Crins, Stephen A. Marshall · First published 2019Open the Tome
Taxonomy of the Carex Pensylvanica complex in North AmericaWilliam J. Crins · First published 1980Open the Tome
