1994
Cortez III Service Corporation, WSMR. 1994. Results of biological surveys for listed taxa at the Launch Complex, Instrumentation Area, and Control Areas associated with the HERA Project. 24 March 1994.
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Echinocereus fendleri var. kuenzleri
Cortez III Service Corporation, WSMR. 1994. Results of biological surveys for listed taxa at the Launch Complex, Instrumentation Area, and Control Areas associated with the HERA Project. 24 March 1994.
Sivinski, R. 1991. Annual Section 6 performance report monitoring endangered plants (job 1). Unpublished report for U.S. Fish and Wildlife Service, Albuquerque, NM. 135 p + maps.
Lee-Chadde, S. and L.F. Huenneke. 1997. A handbook of rare, threatened and endangered plant species of the Sacramento Mountains. Dept. of Biology, New Mexico State University, Las Cruces, NM 88003. Draft. pp. 109.
U.S. Forest Service. 2012. Kuenzler's hedgehog cactus (Echinocereus fendleri var. kuenzleri) inventory and monitoring report. Lincoln National Forest, Smokey Bear Ranger District; Annual report to USFWS TE-841297. 16 p.
Ross, D. Black, M. Fragua, S. Ung, K. (1999) Map of Kuenzler's Cactus Survey. Guadalupe Ranger Districtm Linciln National Forest, USFS. 1 p.
Paul, L. 1997. Unpublished map of survey locations, mostly concerning Echinocereus fendleri var. kuenzleri.
Black, K. Ross, D. Fragua, S. 1997. Unpublished map of survey locations, mostly pertaining to Echinocereus fendleri var. kuenzleri.
Fletcher, R. 1985. Recovery plan for the Kuenzler hedgehog cactus. Prepared for US Fish and Wildlife Service, Albuquerque, NM. 39pp.
Fragia, S. 2010. Unpublished map of survey locations, mostly concerning Echinocereus fendleri var. kuenzleri.
Unknown (2005) Kuenzler Survey 2005, Proposed Tank and Poly Pipe Installation. Guadalupe Ranger District, Lincoln National Forest, USFS. 2 p.