00488nam a2200133Ia 4500008004100000020001400041040004400055100002200099245009200121260004500213300003800258500004100296999001700337180412s9999||||xx |||||||||||||| ||und||  a471047252  aAhmadu Bello University Library - Zaria  aStevens, Roger T. 0aOperational test and evaluation: a systems engineering processcRoger T. Stevens, 1927-  aNew YorkbJohn Wiley and Sons Ltdcc1979  axvii, 275p.: ill., diagr., table.  aIncludes bibliographical references.  c34948d34948