R. Karpf

发表

P. Zador, A. Williams, R. Karpf, 1983, American Journal of Public Health.

Allan F. Williams, P. Zador, R. Karpf, 1983, The Journal of Legal Studies.

P L Zador, P H Wright, R S Karpf, 1982 .

Allan F. Williams, Ronald S. Karpf, R. Karpf, 1983 .

Allan F. Williams, Ronald S. Karpf, R. Karpf, 1984 .