共 21 条
[3]
BELTH JM, 1964, J RISKINSURANCE, V31
[5]
CAMPBELL RA, 1977, THESIS U PENNSYLVANI
[6]
DANZIGER S, 1981, J ECON LIT, V19, P975
[8]
DAVID MH, 1974, LINKAGE RETRIEVAL MI