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.