Teachers' manual.
Subtitle: Nature study, elementary schools.
By: State of Oregon. Adapted from course in elementary science prepared by the Nature study committee of the Portland public schools. 
Contributors: Emerson, Donald Alvin, 1889- ed.; Miller, John M. joint ed.
Publisher: State printing department
Published: 1937
Place of publication: Salem, Or
Language: eng
Number of pages: 93
Subjects: Nature study.; Natural history -- Study and teaching.