Digle ha-madpisim ha-ʿivriyim me-reshit ha-dfus ha-ʿivri ve-ʿad sof ha-meʾa ha-teshaʾ-ʿesŕeh = Hebrew printers'marks from the beginning of Hebrew printing to the end of the 19th century - Yaʿari, Avraham 1899-1966 (The Hebrew University Press Association, 1943)