00573nam a2200205Ia 450000500170000000800410001703700140005804000070007208200230007910000190010210000190012111000270014024500670016726000500023430000370028465000110032165100090033294200090034199900170035020260814110235.0260814t1981    xx            000 0 und d  afotocopia  aen  aBIB/20.07.06/05126  aAscher, Marcia  aAscher, Robert  aUniversity of Michigan 0aCode of the quipu : a study in media, mathematics, and culture  aMichigan :bThe University of Michigan,c1981  avii, 166 pb. : ilus., . : grafs  aQUIPUS  aPERU  tMJCh  c18139d18139