00609nam a22001817a 450000500170000000800410001702000080005804100080006608200190007410000250009324501280011826000290024630000130027570000100028894200070029899900170030595201050032220260721093004.0260721b        |||||||| |||| 00| 0 eng d  a000  aeng  a539.754bLEV/T  a Leveille,Jacques P.  aThe Second Workshop on Grand Unificationb:  university of michigan, ann arber april 24-26, 1981c/ by Jacques P.  Leveille  abostonbbirkhauserc1981  aix,321p.  aet.al  cBK  c49267d49267  001040708NFICaPBBCLbPBBCLcREFd2026-07-21l0o539.754 LEV/Tp59146r2026-07-21w2026-07-21yBK