Long before K.D. Lang transformed herself from a country artist into an androgyne pop idol and sex symbol, smoldering in a man’s suit on the cover of Vanity Fair being mock-shaved by the supermodel Cindy Crawford; long before Melissa Etheridge sold millions of copies of her 1993 album, “Yes I Am,” and in so doing came out as a gay rock star; and long before the singer-songwriter Jill Sobule’s “I Kissed a Girl” hit the Billboard charts, the folk singer Alix Dobkin chopped her hair off, formed a band and recorded “Lavender Jane Loves Women.” Released in 1973, it was the first album recorded and distributed by women for women — arguably the first lesbian record.