Escobaria sneedii var. leei
Rohrer, T. Sharpe, M. (1997) Sensitive Plant Site Report, Population Site Report, Lincoln National Forest, Field Notes. Corypantha sneedii leei. Guadalupe RD, Lincoln NF, USFS. 3 p.
Rohrer, R. Sharpe, M. (1997) Sensitive Plant Site Report, Population Site Report, Lincoln National Forest, Field Notes. Corypantha Sneedii leei. Guadalupe RD, Lincoln NF, USFS. 4 p.
Sharpe, M. Brewer, M. (1997) Sensitive Plant Site Report, Population Site Report, Lincoln National Forest, Field Notes. Corypantha sneedii leei. Guadalupe RD, Lincoln NF, USFS. 4 p.
Sharpe, M. (1997) Inventory Completion Report, Sensitive Plant Survey, Lincoln National Forest, Aquilegia survey- Gilson's Spring. Guadalupe RD, Lincoln NF, USFS.
Van Devender, R., and R. Rondeau. 1992. The status of Sneed's pincushion cactus (Coryphantha sneedii var. sneedii) in Texas. Southwestern Field Biologists. Tuscon, Arizona. 20 p.
Tonne, P. 2002. Results of rare plant surveys on Carlsbad Caverns National Park. 23p. + appendices.
Sharp, M. Bremer, M. (1997). Unpublished map and supporting documentation for Corypantha sneedii var. leei observations. Guadalupe RD, Lincoln NF, USFS. 6 p.
Sharpe, M. Rohrer, T. (1997) Inventory Completion Report, Sensitive Plant Survey, Lincoln National Forest, Field Notes. Guadalupe R.D. Corypantha sneedii leei - Open Hollow Gulch. Guadalupe RD, Lincoln NF, USFS. 3 p.
Sharpe, M. Rohrer, T. (1997) Inventory Completion Report, Sensitive Plant Survey, Lincoln National Forest, Field Notes. Guadalupe R.D. Lee's Survey - Wild Cow Mesa. Guadalupe RD, Lincoln NF, USFS. 3 p.
Sharpe, M. Brewer, M. (1997) Sensitive Plant Site Report, Population Site Report, Lincoln National Forest, Field Notes. Corypantha sneedii leei. Guadalupe RD, Lincoln NF, USFS. 3 p.