@book{oai:ir.ide.go.jp:00045316,
 author = {Valentin, M. Yakushik},
 month = {},
 note = {/622.3/A1005, application/pdf, SPT001400_004},
 publisher = {Institute of Developing Economies},
 title = {Chapter II Basic Characteristics of the Caspian Sea Region},
 year = {1998}
}