R. Kumar
发表
R. Kumar,
1969
.
R. Gopal,
R. Kumar,
D. Agarwal,
1973
.
Vinod Kumar,
K. Sen,
R. Kumar,
1980
.
Manjeet Singh,
R. Kumar,
1968
.
C. Sivaramakrishnan,
R. Kumar,
1974
.
P. C. Dumir,
R. Kumar,
1993
.