@article{paperid:1046876,
author = {صدرنبوی, رامپور},
title = {طبقات تمدنی},
journal = {تحقیقات جغرافیایی},
year = {1976},
volume = {12},
number = {2},
month = {August},
issn = {1019-7052},
pages = {306--320},
			numpages = {14},
keywords = {طبقات تمدنی},
}