<ARTICLE>5
       
                                                    
<PERIOD-TYPE>                                          9-MOS
<FISCAL-YEAR-END>                                      DEC-31-1996
<PERIOD-END>                                           SEP-30-1996
<CASH>                                                    20526746
<SECURITIES>                                                     0
<RECEIVABLES>                                             14913287
<ALLOWANCES>                                                     0
<INVENTORY>                                                      0
<CURRENT-ASSETS>                                                 0
<PP&E>                                                   182815366
<DEPRECIATION>                                           103394464
<TOTAL-ASSETS>                                           114860935
<CURRENT-LIABILITIES>                                            0
<BONDS>                                                          0
<PREFERRED-MANDATORY>                                            0
<PREFERRED>                                                      0
<COMMON>                                                         0
<OTHER-SE>                                               113487402
<TOTAL-LIABILITY-AND-EQUITY>                             114860935
<SALES>                                                          0
<TOTAL-REVENUES>                                          11529663
<CGS>                                                            0
<TOTAL-COSTS>                                                    0
<OTHER-EXPENSES>                                          24160535
<LOSS-PROVISION>                                                 0
<INTEREST-EXPENSE>                                               0
<INCOME-PRETAX>                                         (12630872)
<INCOME-TAX>                                                     0
<INCOME-CONTINUING>                                     (12630872)
<DISCONTINUED>                                                   0
<EXTRAORDINARY>                                                  0
<CHANGES>                                                        0
<NET-INCOME>                                            (12630872)
<EPS-PRIMARY>                                              (26.51)
<EPS-DILUTED>                                                    0