vickie (zarubica ??)
Vickie contributed to contributed to the third Mothers Of Invention album.
mothers of invention: we're only
in it for the money
(1967, lp, usa, verve)
Charles Ulrich added:
According to Gray (p.78), the woman that Pamela calls in Telephone Conversation on WOIIFTM is her friend, not her sister. So presumably her surname is not Zarubica, though I don't know what it is.
Note that Vicki refers to "your father", which would be a very strange way to refer to one's own father.