00319nam a2200121Ia 4500082002000000100002000020245002900040260003400069300002900103490005500132500000500187700000500192 a515.72bN669.DI aNielson, Ole A. aDirect integral theoryb aNew YorkbMarcel Dekkerc1980 aviii, 165p. Index, Bibl. aLecture notes in Pure and Applied Mathematicsv 61 a a