共 15 条
[1]
FERRIMAN A, 1988, OBSERVER 0619, P1
[2]
GRIFFITHS GW, 1972, BR MED J, V2, P553
[3]
HEMON D, 1977, REV EPIDEMIOL SANTE, V25, P33
[5]
MACFARLANE A, 1984, BIRTH COUNTS STATIST
[6]
PHAROAH POP, 1982, STUDIES MED POPULATI, V45, P1
[7]
SIMON J, 1858, GENERAL BOARD HLTH P
[9]
1987, HLTH SCOTLAND 1986
[10]
1988, MATERNITY ACTION, V83, P10