I wrote a post on all-female bands from the 1910s-1950s, and a post covering all-female bands of the 1960s -- here's my attempt at a conclusive A-Z (and other alphabets) of all-female bands of the 1970s. Details are often sketchy or non-existent and as always corrections and contributions are appreciated!
Die Ätztussis were an anarcho-punk band from the Kreuzberg section of West Berlin, active at least as early as 1979 when they played the Antifaschistischen Festival. The members were Cordula (vocals), Kiki (bass), Menusch (guitar), and Petra (drums).
'B' Girls in 1977 (image source: Rodney Bowes)
Cynthia Ross, Lucasta Rochas, Marcy Saddy, and Rhonda Ross formed 'B' Girls in Toronto in 1977. Although they recorded a handful of demos, they only released one single, "Fun At The Beach," on BOMP! in 1979. Roaches was replaced by Xenia Holiday before they broke up in 1981 or ’82. A collection of their recordings were released as Who Says Girls Can't Rock in 1997.