1. Loss of Biological Diversity: A Global Crisis Requiring International Solutions;National Science Board Report,1989
2. Conserving the World's Biological Diversity;McNeely,1990
3. Biodiversity [book],1988
4. Nucleic Acid Techniques in Bacterial Systematics [book],1991
5. The Study of Microorganisms In Situ: Progress and Problems;Brock,1987