共 63 条
[51]
2-4
[52]
Schenker MB, 1998, AM J RESP CRIT CARE, V158, pS1
[53]
Shah B, 1997, SUDAAN USERS MANUAL
[54]
Sobal J, 1996, RURAL SOCIOL, V61, P289, DOI 10.1111/j.1549-0831.1996.tb00621.x
[55]
STRAUB LA, 1992, RURAL HLTH CARE INNO, P3
[58]
*USDA IOW STAT U, 2000, DAT DEC MAK KEOK COU
[59]
WAGENFELD MO, 1994, MENTAL HLTH RURAL AM, P8