00353nam a2200133Ia 4500008004100000041000800041082001900049100002300068245003800091260004000129300000800169650002000177650002200197140306s9999    xx            000 0 und d  aeng  a001.42bMOH/HA  aMohanan kumar, P S  aHand book on research methodology  aKudavechoorbRight publishersc1998  a230  aData collection  aScientific method