000 00320nam a22001217a 4500
050 _aMED HM 131
_bW392
100 _aWeiss, P. A.
245 _aHierarchically organized systems in theory & practice
260 _aNew York
_bHafner Publishing
_c1971
300 _aix, 263p.
_bill.
650 _aHierarchically
942 _cBK
999 _c17475
_d17475