00817cam a22002291 4500 e 24000392 DLC 20260227111215.0 891011s1924 dcu 000 0 eng c e 24000392 (OCoLC)20478138 U.S. Bur. of Education Lib. OO DLC premarc LB3405 .U5 no. 6 Rogers, James Frederick, 1870-1965. Municipal and school playgrounds and their management. Introduction and summary. By J.F. Rogers, Chief of Division of Physical Education and School Hygiene. [Washington, Government Printing Office, 1924] 22 p. 23 cm. United States. Office of Education. School health studies, no. 6 Caption title. Playgrounds. 20697 20697