@PROCEEDINGS {WINCH:1978b, title = {Selection, training and supervision of field staff employed for farm level surveys}, author = {Winch, F. E. }, booktitle = {Learning Material. Paper prepared for the First Farm Level Socio-Economic Studies Workshop, sponsored by the East African Agricultural Economics Society, September 4 - 16, 1978}, year = {1978}, month = {September}, organization = {University of Nairobi}, address = {Nairobi, Kenya}, }