A useful source of background information on the the series is here; it is well worth reading because it deals with how the series began, the people involved, the source of subjects and the marching orders for the illustrators.
The CCA ad series followed somewhat similar series from previous decades and continued until around 1975, but the greatest impact was in the early days, starting in 1950. Graphic style of the 1950s and for a while beyond often took the form of simple, flat shapes arranged in some sort of restrained clutter, and that's what we find here. The captions on the images shown below indicate the artist-designers, all of whom were prominent in the field.
Bayer was the art director, of sorts, for the CCA project.