<ARTICLE> 5 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-END> MAR-31-1997 <CASH> 263,812 <SECURITIES> 0 <RECEIVABLES> 137,698 <ALLOWANCES> 59,314 <INVENTORY> 0 <CURRENT-ASSETS> 0 <PP&E> 3,147,224 <DEPRECIATION> 2,861,437 <TOTAL-ASSETS> 629,816 <CURRENT-LIABILITIES> 0 <BONDS> 0 <COMMON> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <OTHER-SE> 617,871 <TOTAL-LIABILITY-AND-EQUITY> 629,816 <SALES> 0 <TOTAL-REVENUES> 135,078 <CGS> 0 <TOTAL-COSTS> 94,890 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 40,188 <INCOME-TAX> 0 <INCOME-CONTINUING> 40,188 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 40,188 <EPS-PRIMARY> 0 <EPS-DILUTED> 0