<ARTICLE> 5 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-END> MAR-31-1997 <CASH> 343,774 <SECURITIES> 0 <RECEIVABLES> 53,658 <ALLOWANCES> 612 <INVENTORY> 0 <CURRENT-ASSETS> 0 <PP&E> 3,832,106 <DEPRECIATION> 3,688,771 <TOTAL-ASSETS> 616,086 <CURRENT-LIABILITIES> 0 <BONDS> 0 <COMMON> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <OTHER-SE> 599,030 <TOTAL-LIABILITY-AND-EQUITY> 616,086 <SALES> 0 <TOTAL-REVENUES> 117,471 <CGS> 0 <TOTAL-COSTS> 128,461 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 1,966 <INCOME-TAX> 0 <INCOME-CONTINUING> 1,966 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 1,966 <EPS-PRIMARY> 0 <EPS-DILUTED> 0