00343nam a22001217a 4500999001700000020001800017082001900035100002000054245002000074260004200094942000700136952007800143  c65606d65606  a9780521548311  a514.2242 CRO/K  aCromwell, Peter  aKnots and Links  aU KbCambridge University Pressc2004  cBK  001040708MATaGBCTLbGBCTLcF18d2019-11-23o514.2242 CRO/Kp34310yBK