00288nam a2200121Ia 4500008004100000082001300041100002000054245002700074260003300101300000800134942000700142999001700149190709s9999 xx 000 0 und d a514 Z99T aZygmund, Antoni 0aTrigonometrical series aU.S.AbDover publisherc1955 a329 cBK c36931d36931