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Condensed Statements of Income (Unaudited) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Condensed statements of Income [Abstract]        
RENTAL REVENUES $ 137,060 $ 139,639 $ 267,629 $ 268,973
EXPENSES:        
General and administrative 13,237 11,002 51,439 47,947
Depreciation 8,849 8,849 17,698 17,698
Total expenses 22,086 19,851 69,137 65,645
Operating income 114,974 119,788 198,492 203,328
OTHER INCOME:        
Interest 45 45 90 90
Other 800 750 1,300 975
Net income $ 115,819 $ 120,583 $ 199,882 $ 204,393
Net income per limited partnership unit (note 2) $ 4.25 $ 4.42 $ 7.33 $ 7.49
Number of units used in computing per unit amounts 27,006 27,006 27,006 27,006