00331nam a2200145Ia 4500003000500000008004100005020000800046040000900054041001200063082002200075100001800097245003900115260000900154650002200163NDCL180829s9999||||ii |||||||||||||| ||eng||  a417  aNDCL  aEnglish  a320.1 ED216th ed  aEaston, David 4aThe political systemcDavid Easton  c1971  aPolitical Science