Measuring the results of development projects :
Hayes, Samuel Perkins
Measuring the results of development projects : a manual for the use of field workers / Samuel Perkins Hayes. - Paris : UNESCO, 1961. - 100 p. - Monographs in the applied social sciences .
338.984 =20 "1961" HAY.
Measuring the results of development projects : a manual for the use of field workers / Samuel Perkins Hayes. - Paris : UNESCO, 1961. - 100 p. - Monographs in the applied social sciences .
338.984 =20 "1961" HAY.