Offices in the sky,
by Earle Shultz and Walter Simmons. Foreword by Clarence B. Randall.
Shultz, E., Simmons, W. (1959). Offices in the sky. [1st ed.] Indianapolis: Bobbs-Merrill.
Shultz, Earle, and Walter Simmons. Offices In the Sky. [1st ed.] Indianapolis: Bobbs-Merrill, 1959.
Warning: These citations may not always be complete (especially for serials).