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				Plank, a World War Two bomber pilot and graduate of Yale, began 
				as a bookkeeper and tax advisor in Minneapolis helping wealthy 
				investors with tax shelters in the oil and gas business.
 Plank's son Roger said in an interview on Friday his father was 
				picked to run one operation after warning investors they were 
				being fleeced.
 
 The company financed its drilling program through individual 
				partnerships, but Plank kept looking for ways to make the 
				financing more permanent, Roger Plank said. By 1981, he found a 
				law firm that helped fashion the first publicly-traded 
				partnership, a financing method that has gained wide use.
 
 "He'd just noodle things until he could get them done," said 
				Roger Plank. The idea took off after Dow Chemical Co agreed in 
				1982 to sell Apache its U.S. oil exploration business for units 
				in the partnership, he said.
 
 Plank also founded Ucross Foundation, an artist-in-residence 
				program on a 22,000-acre ranch in Ucross, Wyoming, that also was 
				stitched together from tax shelters, Roger Plank said.
 
 The ranch is best known as the place where Annie Proulx partly 
				wrote her Pulitzer Prize-winning novel "The Shipping News."
 
 Known for his colorful and sometimes profane descriptions of 
				rivals, Plank would tell investors that Apache was best at 
				exploiting assets that the oil majors abandoned.
 
 "He described us as pigs following cows through the corn field, 
				picking up their leavings," said Tony Lentini, a former Apache 
				executive. "And behind us were the chickens."
 
 Plank also was known for proposing "outlandish ideas to get 
				people thinking," said Lentini. In the 1980s Apache found oil in 
				the western desert of Egypt where there were no pipelines. Plank 
				got the government to start a truck network to move thousands 
				barrels per day to market until a pipeline could be built.
 
 "We remember Raymond as a visionary leader and a strong, 
				passionate and caring man," said John J. Christmann, Apache's 
				chief executive. "His leadership, courage, generosity and 
				integrity are central to the core values he instilled at Apache, 
				and they continue to guide us today."
 
 Plank is survived by six children, twelve grandchildren and 
				eleven great-grandchildren.
 
 (Reporting by Gary McWilliams; Editing by Sonya Hepinstall)
 
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