000 00279nam a2200109Ia 4500
008 201201s9999 xx 000 0 und d
082 _a725.21
100 _aHELLBERG, R.
245 0 _aTHEIR DESIGN, PLANNING AND ORGANIZATION
260 _bLONDON, B.T. BATSFORD
_c1956
942 _cOB
999 _c17315
_d17315