01028cam a22002651 4500 e 10001941 DLC 20260227111154.0 cr_||||||||||| 801029s1910 nyu 000 0 eng c e 10001941 (OCoLC)6876411 U.S. Off. of educ. Library Vi Vi DLC premarc LB3485 .A8 Ayres, Leonard Porter, 1879-1946. Open air schools [by] Leonard P. Ayres ... New York, Dept. of School Hygiene [1910] 13 p. illus., diagrs. 23 cm. [Russell Sage Foundation. Dept. of Child Hygiene. Pamphlet] no. 71 Reprinted from the Proceedings of the Albany 1910 meeting of the Committee on the Prevention of Tuberculosis of the New York State Charities Aid Association. Also available in digital form on the Internet Archive Web site. Open-air schools. http://hdl.loc.gov/loc.gdc/scd0001.00295011373 19075 19075