@article {duchemin_retroconversion_1993,
	title = {Retroconversion of French cartographic material card catalogues : an overview of the situation},
	journal = {European Research Libraries Cooperation},
	volume = {3},
	number = {1},
	year = {1993},
	pages = {37{\textendash}40},
	author = {Pierre-Yves Duchemin}
}
