@book{57219,
	author = {"Hewitt, E.J. and Cutting, C.U., Eds."},
	title = {"Recent aspects of Nitrogen Metabolism in plants : Proceedings of a symposium held at Long Ashton Res. Station, Univ. of Bristol, April 1967"},
	publisher = {Academic Press},
	year = {London},
	address = {1968}
}