| 000 | 00433cam a22001457a 4500 | ||
|---|---|---|---|
| 008 | 180718b1975 xxu||||| |||| 00| 0 eng d | ||
| 020 | _a0123394503 | ||
| 082 | _aJ72 H369 | ||
| 100 | _aHelly, Walter | ||
| 245 |
_aUrban systems models _cby Walter Helly |
||
| 260 |
_aNew York _bAcademic Press _c1975 |
||
| 300 | _ax, 185p | ||
| 440 | _aOperations research and industrial engineering | ||
| 650 | _aCities and towns-Mathematical models. | ||
| 999 |
_c409909 _d409909 |
||