Hayes, Samuel P.
Measuring the results of development projects: a manual for the use of field workers by Samuel P. Hayes - Paris United Nations Educational, Scientific and Cultural Organization 1959 - 100p. - Monographs in the applied social sciences .
B136037 Un3m
Measuring the results of development projects: a manual for the use of field workers by Samuel P. Hayes - Paris United Nations Educational, Scientific and Cultural Organization 1959 - 100p. - Monographs in the applied social sciences .
B136037 Un3m