Aldrich, R.A. : Survey of pediatric practice in the United States, 1959, appendix to 36th Ross Conference on Pediatric Practice. Columbus, Ohio, Ross Laboratories, 1960, p. 62.
2.
Boulware, J.R. : The composition of private pediatric practice in a small community in the south of the United States. A twenty-five year survey. Pediatrics22: 548, 1958.
3.
Geppert, L.J. : Composition of pediatric practice at a permanent army base in the antibiotic era. Pediatrics22: 336, 1958.
