00381nam a22001457a 450000500170000000800410001702000180005804100080007608200180008410000170010224500500011926000390016930000100020870000170021820260521095158.0260521b        |||||||| |||| 00| 0 eng d  a3-540-09504-7  aeng  a512.55bDUB/L  aDubinsky, Ed  aLecture Notes in Mathematicsc/by Ed Dubinsky  aNew York:bSpringer-Verlag;c1979.  a187p.  aDubinsky, Ed