Pediocactus knowltonii
Roth, D. 2016. Pediocactus knowltonii (Knowlton's Cactus): 2015 summary report, Section 6, segment 29. New Mexico Energy, Minerals, and Natural Resources Department, Forestry Division, Santa Fe, NM. 32 p.
Roth, D. 2015. Pediocactus knowltonii (Knowlton's Cactus) summary report, 2014. NM Energy, Minerals, and Natural Resources Department.
Sivinski, R. 1994. Section 6, Segment 8, Annual report of botanical work accomplished by New Mexico Forestry and Natural Resources Dept. for US Fish and Wildlife Service, Albuquerque, NM.
Roth, D. 2020. Pediocactus knowltonii (Knowlton’s Cactus) Summary Report (Section 6, Segment 34, 2020. EMNRD).
Roth, D. 2016. Pediocactus knowltonii (Knowlton’s Cactus) 30-year Summary Report (Section 6, Segment 30). Unpublished report prepared by EMNRD-Forestry Division, Santa Fe, NM for the U.S. Fish & Wildlife Service, Region 2, Albuquerque, NM.