In the 1980s and '90s, numerous women recorded blistering rock, but things were quite different in 1976 -- when female singers tended to be pigeonholed as soft rockers and singer/songwriters and were encouraged to take after Carly Simon, Melissa Manchester, or Joni Mitchell rather than Led Zeppelin or Black Sabbath.
Greatly influenced by Zep, Heart did its part to help open doors for ladies of loudness with the excellent Dreamboat Annie.
Aggressive yet melodic rockers like "Sing Child," "White Lightning & Wine," and the rock radio staples "Magic Man" and "Crazy on You" led to the tag "the female Led Zeppelin." And in fact, Robert Plant did have a strong influence on Ann Wilson.
But those numbers and caressing, folk-ish ballads like "How Deep It Goes" and the title song also make it clear that the Nancy and Ann Wilson had their own identity and vision early on.