The 1939 AIS Checklist notes: " C. G. Van Tubergen, Jr., later C.G. Van Tubergen Ltd., Zwanenburg Nurseries, Haarlem, Holland. Established about 1881. Bulbgrowers specializing in Daffodils, Tulips and Irises. Breeders of regeliocyclus Irises. One of the most famous nurseries in the world, bringing into cultivation all sorts of rare plants and having such a remarkable collection that it has been known among the trade as "The Museum". Mr. J. Hoog received the Veitch Memorial Medal in 1924 for his work in introducing so many fine plants to cultivation.
1914 catalog Van Tubergen Van Tubergen 1914 For more information on historic Irises visit the Historic Iris Preservation Society at http://www.historiciris.o...
1929 catalog Van Tubergen Van Tubergen 1914 For more information on historic Irises visit the Historic Iris Preservation Society at http://www.historiciris.o...
1946 catalog Van Tubergen by way of Barnes https://archive.org/details/CAT31366375 For more information on historic Irises visit the Historic Iris Preservation So...
1947 catalog Van Tubergen Anniversary catalog https://archive.org/details/newbulboustubero00vant For more information on historic Irises visit the Historic Iris P...
1947 catalog Van Tubergen by way of Barnes https://archive.org/details/CAT31376882/page/n1/mode/2up For more information on historic Irises visit the Historic Iri...
1948 catalog Van Tubergen by way of Barnes https://www.biodiversitylibrary.org/item/302626#page/9/mode/1up For more information on historic Irises visit the Hist...
1949 catalog Van Tubergen by way of Barnes https://www.biodiversitylibrary.org/item/304314#page/3/mode/1up For more information on historic Irises visit the Histo...
1950 catalog Van Tubergen by way of Barnes Distributor https://www.biodiversitylibrary.org/item/307891#page/3/mode/1up For more information on historic Irises vis...