To obtain the relative value in U.S. currency for a given year the number of guilders was divided by the rate of exchange (guilders or pounds per dollar) for that year. The value in U.S. currency for a given year was then entered into the formula at What is the Relative Value? to obtain the relative value in currency in “today’s” money (Consumer Price Index for 2005).
Keisch, B.; Feller, R. L.; Levine, A. S.; Edwards, R. R. (1967). "Dating and Authenticating Works of Art by Measurement of Natural Alpha Emitters". Science 155 (3767): 1238–1242. doi:10.1126/science.155.3767.1238. PMID17847535.
Gerard Terborch, Fr. Hannema, De Gulden Ster, Amsterdam, sans date, mais la préface est datée de 1943. Ce Fr. Hannema doit être Dirk Hannema, cf. l'article de la Wikipédia anglophone.
worldcat.org
Decoen, Jean (1950). Back to the truth, Vermeer-Van Meegeren :Two genuine Vermeers. Rotterdam, éditions Ad. Donker. Illustrations : n/b. (OCLC3340265).