The BiosphereDonald G Kaufman, Cecilia Franz · First published 2005 · Latest edition 2007Open the Tome
Biosphere 2000Donald G. Kaufman, Donald Kaufman, Cecilia Franz · First published 1992 · Latest edition 2000Open the Tome
Hands-on environmental education activities for K-6 teachersDonald G Kaufman · First published 1996Open the Tome
Student learning guide to accompany Biosphere 2000Donald G. Kaufman, Cecilia M. Franz · First published 1992Open the Tome
