lohr, v. (1974). on a few theoretical questions of prognoses and long - term plans for the development of agricultural production. the institute of national planning.

lohr, v. On a Few Theoretical Questions of Prognoses and Long - Term Plans for the Development of Agricultural Production. cairo: the institute of national planning, 1974.

lohr, v. On a Few Theoretical Questions of Prognoses and Long - Term Plans for the Development of Agricultural Production. the institute of national planning, 1974.