 Nursery catalogue R. A. van der Schoot Hillegom, jubilee catalogue 1830-1930 |  Bedaux, J.C. e.a. Stads- of Athenaeumbibliotheek Deventer 1560-1985 |  Zhang Qitai, a.o. Rare flowers and unusual trees, A Collection of Yunnan's Most Treasured Plants |  Guépin, J. P. De kunst van Janus Secundus. De 'kussen' en andere gedichten |  Sing : Britain's Folk Song Magazine, number 60, Vol. 10, number 4 |
