<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> MAR-31-1997 <CASH> 59,939 <SECURITIES> 0 <RECEIVABLES> 1,185,455 <ALLOWANCES> 33,153 <INVENTORY> 282,026 <CURRENT-ASSETS> 1,643,166 <PP&E> 4,320,429 <DEPRECIATION> 2,380,885 <TOTAL-ASSETS> 4,749,776 <CURRENT-LIABILITIES> 1,051,516 <BONDS> 1,417,729 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 320,962 <OTHER-SE> 1,319,283 <TOTAL-LIABILITY-AND-EQUITY> 4,749,776 <SALES> 1,475,238 <TOTAL-REVENUES> 1,475,238 <CGS> 1,240,253 <TOTAL-COSTS> 1,414,099 <OTHER-EXPENSES> (6,910) <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 22,561 <INCOME-PRETAX> 45,488 <INCOME-TAX> 16,147 <INCOME-CONTINUING> 29,341 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 29,341 <EPS-PRIMARY> 0.20 <EPS-DILUTED> 0.20