- Author: Robert M May
- Language: English
- Year: 2019
- Author: Charles Darwin, John Tyler Bonner, Robert M May
- Language: English
- Year: 2008
- Author: Jonathan Roughgarden (editor), Robert M May (editor), Simon A. Levin (editor)
- Language: English
- Year: 2014
Extinction rates
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- Author: John H. Lawton Robert M. May
- Language: English
- Year: 1995
- Author: Robert L. May
- Language: English
- Year: 2011
- Author: Robert M. May
- Language: English
- Year: 2001
- Author: Robert M. May
- Language: English
- Year: 1973
- Author: Robert E. May
- Language: English
- Year: 1973
- Author: Robert E. May
- Language: English
- Year: 2013
- Author: Robert M. May (auth.) M. B. Usher M. H. Williamson (eds.)
- Language: English
- Year: 1974