00263nam a2200109Ia 4500082001900000100002900019245004600048260003500094300001400129500000500143700000500148  a658.5bD691.BP  aDooley, A. R. and Others  aBasic problems, concepts and techniquesb  aNew DelhibWiley Easternc1970  axv, 738p.  a  a