Citation

Gehlbach SH, Williams WA, Woodall JS, Freeman JI. Health Serv. Rep. (HSMHA) 1974; 89(3): 274-277.

Copyright

(Copyright © 1974, U.S. Public Health Service)

DOI

unavailable

PMID

4829489

PMCID

PMC1616203

Abstract

[Abstract unavailable]

Language: en