共 24 条
[2]
BONNELL J A, 1959, Br J Ind Med, V16, P135
[3]
Bonnell JA, 1955, BRIT J IND MED, V12, P181
[4]
BULMER F. M. R., 1938, Canadian Public Health Journal, V29, P19
[5]
CHRISTIE RV, 1954, NONTUBERCULOUS DISEA, P620
[7]
FLETCHER CM, 1952, P ROY SOC MED, V45, P577
[8]
Friberg L., 1950, ACTA MED SCAND S, V138, P240
[9]
GLYNN A. A., 1960, THORAX, V15, P142, DOI 10.1136/thx.15.2.142
[10]
HEARD BRIAN E., 1959, THORAX, V14, P58, DOI 10.1136/thx.14.1.58