<ARTICLE> 5 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-END> JUN-30-1998 <CASH> 2,533,696 <SECURITIES> 0 <RECEIVABLES> 1,135,927 <ALLOWANCES> (602,041) <INVENTORY> 0 <CURRENT-ASSETS> 0 <PP&E> 52,225,732 <DEPRECIATION> (28,219,775) <TOTAL-ASSETS> 37,056,884 <CURRENT-LIABILITIES> 0 <BONDS> 7,125,653 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 28,011,421 <TOTAL-LIABILITY-AND-EQUITY> 37,056,884 <SALES> 4,871,499 <TOTAL-REVENUES> 5,075,767 <CGS> 2,296,911 <TOTAL-COSTS> 3,479,380 <OTHER-EXPENSES> 724,881 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 399,334 <INCOME-PRETAX> 472,172 <INCOME-TAX> 0 <INCOME-CONTINUING> 472,172 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 472,172 <EPS-PRIMARY> 0 <EPS-DILUTED> 0