(1970). The development of rural areas situated in the central part of Europe. [s.l.]: [s.n.].
Παραπομπή Chicago StyleThe Development of Rural Areas Situated in the Central Part of Europe. [s.l.]: [s.n.], 1970.
Παραπομπή MLAThe Development of Rural Areas Situated in the Central Part of Europe. [s.l.]: [s.n.], 1970.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.