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 Atztussis 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)