100+ mentions are found for request
different sources from the year —1902 (34) 1906 (16) 1917 (93) 1923—1935 (9) 1938 (27) 1942 (35) 1943 (1) 2007 (10)

Gustav Modrušan

Source: 'List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia , year 1917.

Gustav Beil

Source: 'List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia , year 1917.

Gustav Frank

Source: 'List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia , year 1917.

Gustav Breitenfeld

Source: 'List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia , year 1917.

Gustav Beil

Source: 'List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia , year 1917.

Gustav Koritić

Source: 'List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia , year 1917.

Gustav Modrušan

Source: 'List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia , year 1917.

Gustav Janeček

Source: 'List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia , year 1917.

Gustav Koritić

Source: 'List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia , year 1917.

Gustav Janecek

Source: 'List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia , year 1917.