Books about Heyel:

booksHunting The Heyel (The Darad Series Book 2) by Daphne Hilsdon (Jan 12, 2014)

booksHuman-Relations Manual for Executives by Heyel, Carl by Carl Heyel (1939)

booksModern excutive technique,: An introduction to the Funk & Wagnalls Reading course in executive technique, (Reading... by Carl Heyel (1948)


Wiki information Heyel:

Carl Heyel
Author, Person