Calculus Sixth Edition/Calculus of a Single VariableRichard M. Grassl · First published 1994Open the Tome
Bergstrasse OdenwaldAnton M. Grassl, Werner Richner, Richard Henk · First published 1988Open the Tome
Discrete and combinatorial mathematicsAbraham P. Hillman, Gerald L. Alexanderson, Richard M. Grassl · First published 1987Open the Tome
