The fourth IAML meeting took place 10–18 September 1955 in Brussels, Belgium, within the framework of the joint Congress of the International Federation of Library Associations and the Internationl Federation for Documentation.

• Reports in Fontes Artis Musicae 2, no. 1 (1955) on JSTOR and 3, no. 1 (1956) on JSTOR
• Albert van der Linden, “The Fourth International Congress of Music Libraries.” Notes 13, no. 1 (1955): 41–45 on JSTOR