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Peter Ricketts
2021
1992
2014
Peter T. Ricketts
2011
Peter J. Ricketts
1986
1990
1983
Barbara Walters, Vincent Corrigan and Peter T. Ricketts
E. E. Douglas Day and Peter J. Ricketts
Matfre Ermengaud, Peter T. Ricketts and Cyril P. Hershon
1989
Ralph J. Penny, Roger Wright and Peter T. Ricketts
2005
Peter Kareiva, Heather Tallis, Taylor H. Ricketts, Gretchen C. Daily and Stephen Polasky
Guilhem De Montaghnol and Peter T. Ricketts
1964
