LITERATURE CITED
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- Anon.. USDC. Weather Bureau. Normal annual precipitation map of Colorado 1931–1970. Water Conservation Board. 215 State Services Building, 1525 Sherman Street, Denver, Colorado.
- Ahmad, Sultan. 1950. Morphology of Disciseda ceruina. Mycologia 42: 149–160.
- Coker, W. C., and J. N. Couch. 1928. The Gasteromycetes of the eastern United States and Canada. University of North Carolina Press, Chapel Hill. 201 p.
- Epstein, Emanuel. 1973. Roots. Sci. Amer. 228(5): 48–58.
- Kreisel, H. 1967. Taxonomisch-pflanzengeographiche Monographie der Gattung Bovistia. Beih. Nova Hedwigia 25: 1–244.
- Lloyd, C. G. 1903. 214—Catastoma; 216—Catastoma circumscissum; 217—Catastoma subterraneum, pp. 121–123. In Mycological Notes, No. 13. Publ, by the author. Cincinnati, Ohio.
- Smith, A. H. 1951. Puffballs and their allies in Michigan. University of Michigan Press, Ann Arbor. 131 p.