Some basic assumptions about children's play.
Series: The Sitter; Extension mimeo -- 3544.; Extension mimeo (Washington State University. Cooperative Extension Service) -- 3544.
Publisher: Cooperative Extension Service, College of Agriculture, Washington State University
Published: 1972
Place of publication: Pullman
Language: eng
Notes: Caption title.

"Kenneth E. Barber"--P. 2.

"Playtime."

"E.M. 3544, March 1972."