00313nam a2200109Ia 4500008004100000040003800041100001600079245003400095260004200129300001600171653001600187211215s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aDavies, R D 0aRadio studies of the universe  bRoutldge and kegan PaulaLondonc1959  aviii,200 p.  aMathematics