Olridge، R. (1986). How relevant are global models for the discussion of world population growth ?: A look at world 3. تنمية الرافدين، مج8, ع18 ، 351 - 372. مسترجع من http://search.mandumah.com/Record/656182
Olridge، Ralf. "How Relevant Are Global Models for the Discussion of World Population Growth ?: A Look At World 3." تنمية الرافدين مج8, ع18 (1986): 351 - 372. مسترجع من http://search.mandumah.com/Record/656182