@book{26899,
	author = {Conference on Principles and Methods of Integrating Aerial Survey Studies of Natural Resources for Potential Development, and Centre national de la recherche scientifique (France)},
	title = {Aerial surveys and integrated studies, proceedings of the Toulouse Conference.},
	publisher = {Unesco,},
	year = {c1968.},
	series = {Natural resources research. Recherches sur les ressources naturelles, 6},
	address = {Paris :}
}