Brussels, 10 November 1955 - Institutional correspondence Robert Giron's letter to Willem Sandberg, dated 10 November 1955
Brussels, 17 February 1956 - Institutional correspondence Robert Giron's letter to Willem Sandberg, dated 17 February 1956
Brussels, 25 February 1956 - Institutional correspondence Robert Giron's letter to Willem Sandberg, dated 25 February 1956
Amsterdam, 21 March 1956 - Institutional correspondence Willem Sandberg's letter to Robert Giron, dated 21 March 1956
Brussels, 28 March 1956 - Insurance documents Robert Giron's letter to Willem Sandberg, dated 28 March 1956
Amsterdam, 4 April 1956 - Institutional correspondence Willem Sandberg's letter to Robert Giron, dated 4 April 1956
Brussels, 10 April 1956 - Institutional correspondence Robert Giron's letter to Willem Sandberg, dated 10 April 1956
Amsterdam, 11 April 1956 - Institutional correspondence Willem Sandberg's letter to Robert Giron, dated 11 April 1956
Amsterdam, 11 January 1956 - Institutional correspondence Willem Sandberg's letter to Robert Giron, dated 11 January 1956
Amsterdam, 27 February 1956 - Institutional correspondence Willem Sandberg's letter to Amsterdam City Council, dated 27 February 1956
Brussels, 4 April 1956 - Institutional correspondence Robert Giron's letter to Willem Sandberg, dated 4 April 1956
Amsterdam, 4 May 1956 - Institutional correspondence Willem Sandberg's letter to Robert Giron, dated 4 May 1956
Stockholm, 7 June 1956 - Institutional correspondence Bo Wennberg's letter to Willem Sandberg, dated 7 June 1956
Brussels, 7 May 1956 - Institutional correspondence Robert Giron's letter to Willem Sandberg, dated 7 May 1956
Amsterdam, 28 January 1957 - Institutional correspondence Willem Sandberg's letter to Robert Giron, dated 28 January 1957
