AU  - Yapa, P.A.J.
TI  - Natural Rubber (in sinhala)
T2  - Science Education Series
CY  - NARESA
PB  - Colombo
KW  - Education
KW  - Rubber Industry
N1  - http://thakshana.nsf.ac.lk/slstic/NA-127/NA_127.pdf
ER  -