Popular Science Mechanical Encyclopedia > Editions
by Ellison Hawks First published January 1st 1941
Published 1941
by Popular Science Publ. Co. (NYC)
1st, Hardcover, 512 pages
Published January 1st 1941
by Popular Science Pub'g. Co.
First Edition, Hardcover
Published January 1st 1943
by Popular Science Publishing Co.
Second Printing, Hardcover