spevacek, v. (1966). the balance of the national economy. the institute of national planning.
Παραπομπή σε μορφή Chicago (17η εκδ.)spevacek, vojtech. The Balance of the National Economy. cairo: the institute of national planning, 1966.
Παραπομπή σε μορφή MLA (9th εκδ.)spevacek, vojtech. The Balance of the National Economy. the institute of national planning, 1966.