00403nam a22001577a 450000500170000000800410001702000140005804100080007208200180008010000210009824500390011926000480015830000150020694200070022199900170022820260713130100.0260713b        |||||||| |||| 00| 0 eng d  a045100284  aeng  a512.87bBRO/L  aBrown, G Spencer  aLaws of Formc/ by G Spencer Brown  aLondon:bGeorge Allen and Unwin Ltd,c1969.  axx, 142p.;  cBK  c48863d48863