Sclerocactus cloveriae ssp. Brackii
Ecosphere Environmental Services, Inc. 2009. Biological survey report: Conoco Phillips Company proposed Pump Canyon compressor site pipeline re-route project. Submitted to BLM Farmington Field Office. 19 p.
Vivalda, M. 2008. Documentation of Mitigation Monitoring of Brack's hardwall cactus (Sclerocactus cloveriae ssp. brackii), COPC's Hamner #9S Well Pad Project.
Wickersham, J. 2005. Ecosphere Environmental Services Report on Threatened and Endangered Species on Atlantic LS #2C.
Kirker, N. 2005. Biological monitoring report construction in Brack's cactus habitat.
Tanner, J. 2004. Documentation of Brack's Fishhook Cactus (Sclerocactus cloveriae ssp. Brackii) within the NOE COM 27 1A well pad.
Powell, E.L. 2004. Ecosphere mitigation measures for Brack's fishhook cacti (Sclerocactus cloveriae var. brackii) within BP America Van Hook LS #1M well pad project.
Frye, K. 2016. Brack's cactus survey on BLM Farmington managed land. Ecosphere Environmental Service.
Creeden, E. 2015. Brack's cactus locations found during clearance surveys for Encana Oil & Gas proposed Blanco Wash I15-2409 oil and gas project . SWCA Environmental Consultants.
Ancell, T. 2012. Ecosphere Environmental Services field data collected on Brack's cactus (Sclerocactus cloveriae var. brackii), 2011-2012. Ecosphere Environmental Services, Farmington, NM.
Prall, D. 2014. Navajo Natural Heritage Program locations for Aztec gilia and Brack's hardwall cactus.