共 62 条
[51]
SIEGEL K, 1985, APR INT C ACQ IMM SY
[52]
Singh B, 1982, Bull Pan Am Health Organ, V16, P59
[53]
SINGH B, 1972, BRIT J VENER DIS, V48, P57
[55]
Singh B, 1977, ADV PLANNED PARENTHO, V12, P45
[56]
SMITH L, 1981, 1ST SEX TRANSM DIS W
[57]
SYRJANEN K, 1984, BRIT J VENER DIS, V60, P243
[58]
TUCKER CW, 1977, GONORRHEA RECIDIVISM
[60]
1981, WHO660 TECHN REP, P30