00316nam a2200121Ia 4500082001800000100002200018245003600040260003400076300001900110490005500129500000500184700000500189  a512bSa254.PO  aSatyanarayana, M.  aPositively ordered semigroupsb  aNew YorkbMarcel Dekkerc1979  av, 102p. Index  aLecture notes in Pure and Applied Mathematicsv 42  a  a