1992
DeBruin, E. 1992. Field survey to Cottonwood Canyon with Abell and Thomas.
F92DEB39NMUS
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cacti
DeBruin, E. 1992. Field survey to Cottonwood Canyon with Abell and Thomas.
DeBruin, E. 1992. Field survey to Elk NM, with Abell and Thomas, August 1992.
DeBruin, E. 1992. Field survey to Bates Ranch, August 1992.
Benson, L. 1982. The Cacti of the United States and Canada. Stanford University Press, Stanford, California. 1044 pp.
Heil, K.D., and J.M. Porter. 1994. Sclerocactus (Cactaceae): A revision. Haseltonia 2:20-46.
DeBruin, E. 1992. Field survey to Short Canyon with Abell and Thomas.
DeBruin, E. 1992. Field survey to Mattews Canyon with Abell and Thomas.
DeBruin, E. 1992. Field survey to Chiquita Canyon, with Abell and Thomas.
Worthington, R.D. 1986. Observations on the flowering of cacti from the vicinity of El Paso, Texas. Cactus and Succulent J. 58: 213-217.