* California Department of Fish and Game page on the species*USFWS Environmental Conservation Online System page for Razorback sucker* USFWS Upper Colorado Endangered Fish Recovery Program*USFWS List of Fish Listed under Endangered Species Act
* California Department of Fish and Game page on the species*USFWS Environmental Conservation Online System page for Razorback sucker* USFWS Upper Colorado Endangered Fish Recovery Program*USFWS List of Fish Listed under Endangered Species Act