2005
Dodge, J. 2005. Documentation of cancellation mitigation monitoring of Brack's hardwall cactus (Sclerocactus cloveriae ssp. brackii), BP's A.L. Elliott D #1C Well Pad Project.
U05DOD02NMUS
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Sclerocactus cloveriae ssp. cloveriae
Dodge, J. 2005. Documentation of cancellation mitigation monitoring of Brack's hardwall cactus (Sclerocactus cloveriae ssp. brackii), BP's A.L. Elliott D #1C Well Pad Project.
Powell, E.L. 2004. Ecosphere Environmental Services Report on transplanted Brack's cacti at the proposed BP Lobato Gas Com E #1M well pad.
Ecosphere Environmental Services, Inc. 2011. Biological survey report: William Four Corners, LLC proposed Lateral R-5 pipeline lowering project. Submitted to BLM Farmington Field Office. 14 p.
Rink, G. 2006. Plant collection list at Aztec Ruins and El Morro National Monuments.
Heil, Kenneth D. and J.M. Porter. 1994. Sclerocactus (Cactaceae): A revision. Haseltonia 1994(2): 20-46.
East, M. 2015. Database of surveys for Brack's cactus (Sclerocactus cloveriae ssp. brackii) in northwestern New Mexico. Natural Heritage New Mexico.