Indicação de Proveniencia Regulamentada (IPR)
A second-level ranking for Portuguese wines that are striving to achieve Portugal’s highest ranking, Denominação de Origem Controlada.
The New Wine Lovers Companion, 2nd Edition, by Ron Herbst and Sharon Tyler Herbst. Copyright © (1) 2003, 1995 by Ron Herbst and Sharon Tyler Herbst. Reprinted by arrangement with Barron's Educational Series, Inc.