Willy Sluiter, 1914, poster, RP-P-OB-18.131
Willy Sluiter, 1913, poster, RP-P-OB-18.126
Willy Sluiter, c. 1916, poster, RP-P-OB-18.132
Willy Sluiter, 1913, poster, RP-P-OB-18.129
Willy Sluiter, 1922, poster, RP-P-1924-739
Willy Sluiter, c. 1918, poster, RP-P-OB-18.133
Willy Sluiter, 1916, poster, RP-P-1924-737
Willy Sluiter, c. 1916, poster, RP-P-1924-740
Willy Sluiter, 1916, poster, RP-P-1917-1078
Willy Sluiter, c. 1920, poster, RP-P-1922-715
