R. Ayyangar
发表
S. Datta,
R. Ayyangar,
J. Magbanua,
1967,
Experimental Agriculture.
M. Rao,
P. Rao,
R. Ayyangar,
1985,
Journal of the Indian Society of Remote Sensing.
P. N. Rao,
K. R. Rao,
R. Ayyangar,
1980,
Journal of the Indian Society of Remote Sensing.