<ARTICLE> 5 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-END> MAR-31-1999 <CASH> 3,443,780 <SECURITIES> 0 <RECEIVABLES> 1,097,931 <ALLOWANCES> (530,164) <INVENTORY> 0 <CURRENT-ASSETS> 0 <PP&E> 52,637,235 <DEPRECIATION> (29,888,625) <TOTAL-ASSETS> 36,866,022 <CURRENT-LIABILITIES> 0 <BONDS> 7,077,678 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 27,309,211 <TOTAL-LIABILITY-AND-EQUITY> 36,866,022 <SALES> 2,496,818 <TOTAL-REVENUES> 2,547,423 <CGS> 1,141,837 <TOTAL-COSTS> 1,705,304 <OTHER-EXPENSES> 298,627 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 193,927 <INCOME-PRETAX> 349,565 <INCOME-TAX> 0 <INCOME-CONTINUING> 349,565 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 349,565 <EPS-PRIMARY> 0 <EPS-DILUTED> 0