共 4 条
[3]
Muth R. F., 1964, OXFORD ECON PAP, V16, P221, DOI [https://doi.org/10.1093/oxfordjournals.oep.a040951, DOI 10.1093/OXFORDJOURNALS.OEP.A040951]
[4]
SCOBIE GM, 1977, IMPACT HIGH YIELDING