Kristofer Schipper, a sinologist who teaches at the University of Paris, did field work here in the early sixties, amassing a large ketzai collection and publishing an index of 50O old songs.
任教法國巴黎學院的漢學家施博爾，在民國五十年初，趁在台灣田野調查之便，大量搜購這些台灣俗曲唱本，而發表有「五百首歌仔冊目錄」文章。