<ARTICLE> 5 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-END> JUN-30-1999 <CASH> 4,340,686 <SECURITIES> 0 <RECEIVABLES> 1,008,378 <ALLOWANCES> (490,956) <INVENTORY> 0 <CURRENT-ASSETS> 0 <PP&E> 52,837,333 <DEPRECIATION> (30,438,280) <TOTAL-ASSETS> 37,330,587 <CURRENT-LIABILITIES> 0 <BONDS> 7,060,917 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 27,335,634 <TOTAL-LIABILITY-AND-EQUITY> 37,330,587 <SALES> 5,012,024 <TOTAL-REVENUES> 5,111,860 <CGS> 2,354,332 <TOTAL-COSTS> 3,467,454 <OTHER-EXPENSES> 882,004 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 386,414 <INCOME-PRETAX> 375,988 <INCOME-TAX> 0 <INCOME-CONTINUING> 375,988 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 375,988 <EPS-BASIC> 0 <EPS-DILUTED> 0