Avengers #83 (Marvel, 1970 — Cover A)

The Wasp visits the Mansion and comes face-to-face with the Liberators, an all-female super hero team fighting "male oppression." Team-leader Valkyrie was a former scientist who exposed herself to a chemical after squaring off with a chauvinistic colleague. Now, Valkyrie is endowed with super-human strength, and will stop at nothing to fight the double-standard of being a super-woman!