Raven, P.H., Berg, L.R., and Johnson, G.B. 1993. Environment. Phladelphia, Saunders.
Johnson,G.B. 1994. Biology: Visualizing Life. Austin, HOlt, Rinehart and Winston.
Johnson, G.B. 1994. Human Biology: Exploring Concepts. Dubuque, Wm C Brown.
Raven, P.H. and Johnson, G.B. 1994. Understanding Biology. Dubuque, Wm C Brown, 3rd edition.
Johnson, G.B. 1995. Biology: Principles and Explorations . Austin, Holt, Rinehart, and Winston.
Johnson, G.B. 1995. How Scientists Think. Dubuque, Wm C Brown.
Johnson, G.B. 1995. Explorations in Human Biology, An Interactive CD-ROM. Dubuque, Wm C Brown.
Johnson, G.B. 1996. The Living World. Dubuque, Wm C Brown.
Raven, P.H. and Johnson, G.B. 1996. Biology. Dubuque, Wm C Brown, 4th edition.
Johnson, G.B. 1996. Explorations in Cell Biology and Genetics, An Interactive CD-ROM. Dubuque, Wm C Brown.