Randolph Philip Hoelscher, Clifford Harry Springer & Richard F. Pohle.
Industrial production illustration., 2nd ed.
R587253. Industrial production illustration. By Randolph Philip Hoelscher, Clifford Harry Springer & Richard F. Pohle. 2nd ed. © 17Dec46; A9884. Ruby Hoelscher (W); 7Oct74; R587253.
Ruby Hoelscher|W