I'm mostly going through my collection of these alphabetically, which is why we've had so many Bettys (including Bettie Page in the group). I think the last of these is Betty Balfour, so let's take a look at her now:
Betty Balfours, from Cartoon Fun and Comedy (April, 1976)
CSR readers may be thinking, "A good-looking girl to be sure, Web-Ed, but don't you usually present us with an, um,
rear view of these girls?"
Indeed I do my friends, but take a look at this and you will see there is a method to my madness:

Betty Balfours(? - we think probably not) from
Popular Jokes (February, 1976).
The editors forgot to give us the model's name, even a pseudonym, but what a fine fanny! (Such lapses were common at Humorama, where they even goofed up the volume/number information every now and then). With a rear end like that she's certainly super-spankable, but are these photos of the same girl? After looking closely at the left eyebrows and upper lips, we think not, although the two girls certainly resemble one another. If the second one isn't Betty, we wonder if Humorama ever published a photo highlighting the real Betty's bottom.
What do you guys think?