Tropical agricultural research & extension, Vol. 15, no.1-4 (2012) : Vol. 16, no. 1-4 (2013) : Vol.17, no. 1-4 (2014)
- Ruhuna: Faculty of Agriculture, University of Ruhuna, 2014.
13913646
630.05 / TRO
13913646
630.05 / TRO