@book{18706,
	author = {Alphen, J. G. Van. and Ríos Romero, F. de los. and Instituto Internacional de Rescate y Mejoramiento Técnico de Tierras.},
	title = {Gypsiferous soils, notes on their characteristics and management},
	publisher = {International Institute of Land Reclamation and Improvement,},
	year = {1971},
	series = {Bulletin},
	address = {Wageningen :}
}