|Dr. Jekyll and Sister Hyde (1971) [Betsy]: Stabbed in the back by Ralph Bates in her bedroom.
Demons of the Mind (Blood Evil; Blood Will Have Blood; Nightmare of Terror) (1972) [Inge]: Strangled by Shane Briant in an outdoor garden. (Nudity alert: Topless)
Disciple of Death (1972) [Ruth]: Stabbed in the chest and has her heart cut out by Mike Raven, after being tied to a sacrificial altar. She then returns to life as one of his zombie slaves, but apparently dies once again when she burns down his house by deliberately knocking over a candle. (We see her surrounded by flames as the house burns...the movie's so unclear, I'm not sure whether fire is supposed to destroy her or not.)
Dracula (1973) [Dracula's Wife]: Stabbed in the chest with a wooden stake (along with Sarah Douglas and Barbara Lindley) by Nigel Davenport as she's lying in her coffin. (Only Virginia's staking is shown on-camera; the other two are off-screen.)