<ARTICLE> 5
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               SEP-30-1997
<CASH>                                         218,142
<SECURITIES>                                         0
<RECEIVABLES>                                  156,202
<ALLOWANCES>                                    87,041
<INVENTORY>                                          0
<CURRENT-ASSETS>                                     0
<PP&E>                                       2,285,662
<DEPRECIATION>                               2,162,733
<TOTAL-ASSETS>                                 410,421
<CURRENT-LIABILITIES>                                0
<BONDS>                                              0
<COMMON>                                             0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<OTHER-SE>                                     382,703
<TOTAL-LIABILITY-AND-EQUITY>                   410,421
<SALES>                                              0
<TOTAL-REVENUES>                               330,630
<CGS>                                                0
<TOTAL-COSTS>                                  280,307
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 50,323
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                             50,323
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    50,323
<EPS-PRIMARY>                                        0
<EPS-DILUTED>                                        0