Growth and problems of world population and Sri Lanka (in Sinhala)
Ratnayake, M.
Growth and problems of world population and Sri Lanka (in Sinhala) - NARESA Colombo 1991 - 45 lk - Population Growth Population Problems World Population Sri Lanka Population Population Development - Science Education Series No.35 .
http://thakshana.nsf.ac.lk/slstic/NA-128/NA_128.pdf = Ratnayake, M.
M
B
NA-128
NA-128
Education
Population
37
Growth and problems of world population and Sri Lanka (in Sinhala) - NARESA Colombo 1991 - 45 lk - Population Growth Population Problems World Population Sri Lanka Population Population Development - Science Education Series No.35 .
http://thakshana.nsf.ac.lk/slstic/NA-128/NA_128.pdf = Ratnayake, M.
M
B
NA-128
NA-128
Education
Population
37