52 Note Figures based on the following documents: ANWB Archief Den Haag 174, Rijwielpadverenigingen, letter by the Algemeene Nederlandsche Vereeniging voor Vreemdelingenverkeer (ANVV
) to the ANWB, 25 April 1938; letter by ANWB to the ANVV
, 27 April 1938; letter by the ANWB to the ANVV
, 16 May 1938; letter by the ANWB to the ANVV
, 23 November 1938.