00400nam a2200157Ia 450000500170000000800410001704000190005804100120007708200130008910000160010224500370011826000420015530000200019765000150021785000100023220240529115602.0131103s9999    xx            000 0 und d  aLoreto College  aEnglish  a511bHOO  aHood, Peter  aHow time is measuredcPeter Hood  aLondonbOxford University Pressc1955  a64p.b ill.maps  aArithmetic  aLCBED