R. Billings

发表

D. Agthe, R. Billings, J. M. Dworkin, 1988 .

R. Billings, Brenda González-Hermosillo, Ceyla Pazarbaşioğlu, 1997 .

Brenda González-Hermosillo, R. Billings, Ceyla Pazarba_1o lu, 1996, SSRN Electronic Journal.

R. Bruce Billings, Donald E. Agthe, D. Agthe, 1980 .

R. Bruce Billings, Donald E. Agthe, D. Agthe, 1998 .

R. Bruce Billings, Donald E. Agthe, D. Agthe, 1980 .

R. Bruce Billings, Donald E. Agthe, K. Raffiee, 1986 .

Nathan Buras, R. Bruce Billings, Donald E. Agthe, 2003 .