Reflective equilibriumRobert Heeger, Wibren van der Burg, Theodoor van Willigenburg · First published 1998Open the Tome
New directions in psychohistoryErik H. Erikson, Mel Albin, Robert James Devlin, Gerald A. Heeger · First published 1980Open the Tome
De Theophrasti qui fertur Peri Sēmeiōn libroMaximilian Robert Heeger · First published 1889Open the Tome
