共 18 条
[3]
HELM P, 1989, SCAND J PRIM HEALTH, V8, P59
[4]
HIRSCH MB, 1987, FERTIL STERIL, V47, P618
[5]
IHALAINEN O, 1975, ACTA PSYCHIATR SCA S, V262
[6]
LISTOL K, 1980, AM J EPIDEMIOL, V111, P753
[8]
LENGTH AND VARIATION IN THE MENSTRUAL-CYCLE - A CROSS-SECTIONAL STUDY FROM A DANISH COUNTY
[J].
BRITISH JOURNAL OF OBSTETRICS AND GYNAECOLOGY,
1992, 99 (05)
:422-429
[9]
SECONDARY AMENORRHEA - PREVALENCE AND MEDICAL CONTACT - A CROSS-SECTIONAL STUDY FROM A DANISH COUNTY
[J].
BRITISH JOURNAL OF OBSTETRICS AND GYNAECOLOGY,
1992, 99 (05)
:430-433
[10]
NORUSIS MJ, 1988, SPSS PCPLUS V2 0