共 38 条
[31]
Sloan F A, 1981, Inquiry, V18, P224
[34]
Sloan FA., 1983, HEALTH AFFAIR, V2, P25, DOI DOI 10.1377/HLTHAFF.2.1.25
[35]
*US BUR CENS, 1982, 1981 STAT ABSTR US
[36]
WALDHOLZ M, 1982, WALL STREET J, V63, P1
[37]
Watts C A, 1980, Inquiry, V17, P357
[38]
1979, HOSPITALS, V53, P63