Harry E. Hershey.
Automatic telephone practice., 6th ed.
R654543. Automatic telephone practice. By Harry E. Hershey. 6th ed. © 8Jun49; A33614. Mildred Hershey Robb & Donna E. Hershey (C); 16Mar77; R654543.
Mildred Hershey Robb & Donna E. Hershey|C