Steliac, N. The relation between opportunity costs and regional development,
, 2007, с. 31-39.
Steliac, N. .
The relation between opportunity costs and regional development.
Шумен: , 2007, с. 31-39.
Steliac, N. (2007)
The relation between opportunity costs and regional development,
Шумен: , с. 31-39
Steliac, N.
(2007).
The relation between opportunity costs and regional development. Годишник на Шуменския университет "Епископ Константин Преславски". Шумен: 17B4 с. 31-39.