Have long enjoyed their distinctive harmony singing and writings; my list of superlatives could be extensive!
My late partner amended their "WE" song to introduce our last a cappella harmony group ("Work in Progress") - it was a popular number and we always paid homage to these quirky gals.
Time to dig out my LPs/Tapes/CDs and listen again to them, "for the joy that's in it" as Stewie would say ....

Vale, Maggie. Thanks for your music.

R-J
Down Under