Website: Musical Gazzettes
Almost 25,000 musical magazines published in Italy before the first world war have been digitized by the Centro internazionale di ricerca sui periodici musicali (The International Center for Research on Musical Periodicals) in Parma. Among their holdings the most prolific were Milan's Gazzetta musicale di Milano, London's Musical Standard, and Paris's Revue et gazette musicale. The best way to find them from this start site at the Internet Culturale is to use the filters for language and date of publication at the left.
The Phonographic Newspaper
Website: Phonographische Zeitschrift
The Phonographische Zeitschrift (Phonographic Newspaper) was published on poor-quality paper from 1900 to 1938. It was subtitled "a fact sheet for the music- and speech-making industry". Most issues available (2021) apart from those for five scattered years from which nothing survives.
Open-Access Music Journals
Website: Open-Access Music Journals
Matthew Franke's list of open-access music journals is quite comprehensive. Contributions can be sent to him at this address.