共 8 条
[1]
ACHESON E. D., 1967, LANCET, V7523, P988
[2]
CUMMINGS M M, 1956, Postgrad Med, V19, P437
[4]
CUMMINGS MM, 1964, ACTA MED SCAND S425, P48
[7]
MILHAM S, 1967, LANCET, V7507, P136
[8]
1965, USDA17 US DEP AGR RE