00426nam a2200157Ia 4500008004100000082001600041100002700057245003600084250000600120260005400126300000800180650002200188650002000210653001400230653002400244170901s1963    xx            000 0 und d  a320.9bV16E  aValkenburg, Samuel Van 0aElements of Political Geography  a2  aNew DelhibPrentice-Hall of India Pvt. Ltd.c1963  a400  aPolitical science  aSocial sciences  aBoundries  aPolitical geography