HEISS, ELWOOD D.
Modern methods and materials for teaching science. By Elwood D. Heiss, Ellsworth S. Obourn & C. Wesley Hoffman.
HEISS, ELWOOD D. Modern methods and materials for teaching science. By Elwood D. Heiss, Ellsworth S. Obourn & C. Wesley Hoffman. © 9Jan40; A136214. Charles Wesley Hoffman & Elwood D. Heiss (A); 21Jun67; R412144.
Charles Wesley Hoffman & Elwood D. Heiss|A