00534nam a2200193Ia 4500 CTU_85246 210402s9999 xx 000 0 und d 384.6 K64 Kleinfield, Sonny The Biggest Company on Earth : A Profile of AT&T Sonny Kleinfield New York Holt, Rinehart and Winston 1981 American telephone and telegraph Năm Trung tâm Học liệu Trường Đại học Cần Thơ