00321nam a2200133Ia 4500020000900000082001100009100001800020245008100038250000600119260004200125300000800167500000600175650000600181  aNULL  a513.83  aRogers, C. A. 0aCambridge Tracts in Mathematics and Mathematical Physics: Packing & Covering  a-  aCambridgebCambridge University Press  a177  a0  a-