NALDC

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MLA

Tooley, Paul W, and Nichole R O'Neil. Intraspecific variation in Claviceps africana. , 2002.

APA

Tooley, Paul W, and O'Neil, Nichole R. (2002). Intraspecific variation in Claviceps africana. .

Chicago

Tooley, Paul W., and Nichole R O'Neil. Intraspecific variation in Claviceps africana. , 2002.