共 12 条
[4]
BROOK RH, 1972, THESIS JOHNS HOPKINS
[5]
Cabot RC, 1912, J AMER MED ASSOC, V59, P2295
[6]
CODMAN EA, 1916, STUDY HOSPITAL EFFIC
[9]
COMPARISON OF PREMATURITY AND PERINATAL-MORTALITY IN A GENERAL-POPULATION AND IN THE POPULATION OF A PREPAID GROUP-PRACTICE, MEDICAL-CARE PLAN
[J].
AMERICAN JOURNAL OF PUBLIC HEALTH AND THE NATIONS HEALTH,
1958, 48 (02)
:170-187