<ARTICLE> 5 <CIK> 0000882343 <NAME> 90BC. <MULTIPLIER> 1 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-END> JUN-30-1997 <CASH> 124,050 <SECURITIES> 0 <RECEIVABLES> 118,230 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 242,280 <PP&E> 9,569,201 <DEPRECIATION> 6,612,541 <TOTAL-ASSETS> 3,198,940 <CURRENT-LIABILITIES> 33,679 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 3,165,261 <TOTAL-LIABILITY-AND-EQUITY> 3,198,940 <SALES> 588,581 <TOTAL-REVENUES> 593,203 <CGS> 0 <TOTAL-COSTS> 399,745 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 193,458 <INCOME-TAX> 0 <INCOME-CONTINUING> 193,458 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 193,458 <EPS-PRIMARY> 16.10 <EPS-DILUTED> 0