@article {grolier_notes_1991,
	title = {Some notes on the question of a so-called {\textquoteright}Unified Classification{\textquoteright}},
	journal = {Tools for knowledge organisation and the human interface. Proceedings of the 1st International {ISKO} Conference, Darmstadt, 14-17 August 1990},
	year = {1991},
	pages = {85{\textendash}108},
	author = {Eric de Grolier}
}
