00305nam a2200121Ia 4500082002500000100002300025245003700048260003300085300002800118490002700146500000500173700000500178  a519.5024574bB334.CS  aBatschelet, Edward  aCircular statistics in biologyb  aLondonbAcademic Pressc1981  axvi, 371p. Index, Bibl.  aMathematics in Biology  a  a