Den Haag, Algemeene Landsdrukkerij, 1910, directie van den arbeid, Departement van Landbouw, Nijverheid en Handel, 30pp. large fold out lithograph map, original softcover binding, spine gone, bloc loose, library stamps. Polderjongens was the Dutch name for the workers that build dikes, drained polders and constructed related objects. From the library of Prof. Dr. G.P. van de Ven. Gerard van de Ven (1941-2017) was a prominent Dutch scholar, author and professor at the Universiteit van Amsterdam. He was specialised in waterstaatsgeschiedenis (history of water management) and historical geography. He wrote many books, articles and contributed to many publications.