"V". World Directory of Map Collections: 4th Edition, edited by Olivier Loiseaux, Berlin, New York: K. G. Saur, 2000, pp. 492-494. https://doi.org/10.1515/9783110950434.492
(2000). V. In O. Loiseaux (Ed.), World Directory of Map Collections: 4th Edition (pp. 492-494). Berlin, New York: K. G. Saur. https://doi.org/10.1515/9783110950434.492
"V" In World Directory of Map Collections: 4th Edition edited by Olivier Loiseaux, 492-494. Berlin, New York: K. G. Saur, 2000. https://doi.org/10.1515/9783110950434.492