Naze kaeranu sanjūnen
Subtitle: Watashitachi no hoppō ryōdo hakusho
By: Hoppō o Kataru Kai hen.
Contributors: Hoppō o Kataru Kai
Publisher: Dōkai
Published: 1976
Place of publication: Tokyo
Language: jpn
Number of pages: 168
Subjects: Sakhalin (Sakhalinskai︠a︡ oblastʹ, Russia); Japan -- Foreign relations -- Russia; Russia -- Foreign relations -- Japan