Help with the Supremes timeline

[Stone Diamond]

I'm doing a timeline for the Supremes (lead voice first) and would be grateful if someone can fill in the date for the question mark around 1976; and at the same time tell me if I've got the whole of this list right, as I'll be using it for the Supremes screens. . .

The Primettes
1959 - 1960
Diane Ross, Mary Wilson, Florence Ballard, Betty McGlown

The Primettes
1960 - January 1961
Diane Ross, Barbara Martin, Mary Wilson, Florence Ballard

The Supremes
January 15, 1961 to September 1961
Diane Ross, Barbara Martin, Mary Wilson, Florence Ballard

The Supremes
October 1961 to June 1967
Diana Ross, Mary Wilson, Florence Ballard,

Diana Ross & The Supremes
July 1967 to January 1970
Diana Ross, Mary Wilson, Cindy Birdsong,

The Supremes
January 1970 to April 1972
Jean Terrell, Mary Wilson, Cindy Birdsong

The Supremes
April 1972 to October 1973
Jean Terrell, Mary Wilson, Lynda Laurence

The Supremes
October 1973 - to January 1976
Scherrie Payne, Mary Wilson, Cindy Birdsong,

The Supremes
January 1976 to ?
Scherrie Payne, Mary Wilson, Susaye Greene.


Thanks
Alan