Exploring regions of the United StatesHerbert Henry Gross, Ben F. Ahlschwede · First published 1971Open the Tome
Exploring regions of the Western HemisphereHerbert Henry Gross, Dwight W. Follett, Robert E. Gabler, William L. Burton, Ben F. Ahlschwede · First published 1966Open the Tome
Teacher's guide for Exploring the old world, rev. edBen F. Ahlschwede · First published 1965Open the Tome
Exploring the Old WorldO Stuart Hamer, Dwight W Follett, Herbert H Gross, Ralph Sandlin Yohe, Ben F. Ahlschwede, Orlando W Stephenson · First published 1964Open the Tome
Teacher's guide for Exploring the New World and Exploring our countryBen F. Ahlschwede · First published 1954Open the Tome
