Dressage Horse OptimizedJim Masterson, Betsy Steiner, Susan Harris, Coralie Hughes · First published 2015Open the Tome
Explorations in General BiologyMichael Windelspecht, Betsy Harris · First published 2011Open the Tome
Explorations in General Biology IIMichael Windelspecht, Betsy Harris · First published 2002Open the Tome
A child's garden of dreamsBetsy Beinecke Shirley, James H. Duff, Gėnė E. Harris, Brandywine River Museum · First published 1989Open the Tome
