Form and Strategy in ScienceJ.R. Gregg, F.T.C. Harris · First published 1964 · Latest edition 2011Open the Tome
A History of The Oregon Trail, Sante Fe Trail and Other TrailsGregg J.R. · First published 1955Open the Tome
Gregg speed studies and Graded readings in Gregg shorthandJohn Robert Gregg · First published 1936Open the Tome
