Extension science
Roling, Niels
Extension science information systems in agricultural development - Cambridge Cambridge University Press 1988 - xii, 233p.
0521344379
Science
371.38:63.001.6 / ROL-E
Extension science information systems in agricultural development - Cambridge Cambridge University Press 1988 - xii, 233p.
0521344379
Science
371.38:63.001.6 / ROL-E