2000 journal article
Identification of effective strains of Bradyrhizobium for Arachis pintoi
Tropical Agriculture, 77(4), 226–231.
Microbial evolution: A narrative history of microbiology at North Carolina State University
Raleigh, NC: Published by North Carolina Agricultural Foundation, Inc.
Current issues in symbiotic nitrogen fixation: Selected papers of the 15th North American Conference on Symbiotic Nitrogen Fixation held at North Carolina State University, Raleigh, NC, USA, 13-17 August 1995
Dordrecht; London: Kluwer Academic.
In The Prokaryotes : a handbook on the biology of bacteria : ecophysiology, isolation, identification, applications (p. 2197). New York : Springer-Verlag.
In Nitrogen fixation.Volume 2.Rhizobium (p. 147). Oxford: Clarendon Press.