00299nam a2200121Ia 4500082002000000100001800020245002400038260003400062300001000096490006100106500000500167700000500172  a519.7bAs827.ST  aAshour, Said.  aSequencing theoryb  aBerlinbSpringer-Verlagc1972  a133p.  aLecture notes in Economics and Mathematical Systemsv 69  a  a