Penelitian dibidang ilmu ekonomi pertanian dan beberapa metode pengambilan tjontoh

Buku penuntun bagi mahasiswa tingkat sardjana Fakultas Pertanian, Institut Pertanian Bogor ...

The physical and biological problems may be more numerous and as important,
but because of the role played by local environment, they do not lend themselves
so readily to collective action in the international sphere. The agricultural ...