Eric Lee-Mader, Anne Stine, Jarrod Fowler, Jennifer Hopwood and Mace Vaughanby – Xerces Society for Invertebrate Conservation with contributions from the USDA Natural Resources Conservation Service
August 2017
Dave Dyer – USDA NRCS Plant Materials Center, Davis, California.
September 2005
Plant Guide for Woollypod Vetch
Source link here.
Daren Redfearn and Bruce Anderson – University of Nebraska
December 2016
Is Nitrogen Fixation Oversold with Legume Cover Crops?
Source link here.