Found it! Portrait Photography: The Art of Photographing People (The Art & Design Series) by Oscar White
(ISBN 10: 0136873278 / ISBN 13: 9780136873273 )
Published in 1983 so my recollection of it is off a bit.
Thanks Molli. Your post put me on the right track.
Ebay auction 230776021849 has a picture of the covers.