R G Packard
发表
W A Yrjanson,
R G Packard,
1980
.
G K Ray,
R G Packard,
M L Crawley,
1971
.
R G Packard,
1998
.
R G Packard,
Anastasios M. Ioannides,
R A Salsilli,
1992
.
G K Ray,
R G Packard,
E C Lokken,
1975
.
R G Packard,
1999
.
R G Packard,
G E Allen,
1984
.
R G Packard,
P A Okamoto,
C-L Wu,
1993
.
S D Tayabji,
R G Packard,
1985
.
R G Packard,
1994
.
R G Packard,
1973
.
R G Packard,
1977
.
R G Packard,
P A Okamoto,
1989
.
R G Packard,
2000
.
R G Packard,
1987
.
R G Packard,
E Guy Robbins,
1979
.
R G Packard,
R. Packard,
Robert G. Packard,
1970,
Journal of applied behavior analysis.