@book{16952,
	author = {Hauck, Roland Daniel and Soil Science Society of America. SSSA. },
	title = {Field measurement of dinitrogen fixation and denitrification /},
	publisher = {Soil Science Society of America,},
	year = {1986.},
	series = {SSSA special publication ;},
	address = {Madison, WI :},
	note = {Proceedings of a symposium .. 15 Aug.,1983.}
}