Pink Cherie Model Trivia Contest!

It's Friday, and the Fashion Bomb is in a giving mood!
Whoever can tell me the names of the groundbreaking covergirls featured on the magazines below:

And the significance of their appearance will win this Long Chiffon Zebra Print Scarf...
...from contest sponsor Pink Cherie!
Leave a comment with your most complete answer. The best comment will win!
Hint: They were firsts.

We have a winner!

Ally gave the most comprehensive answer, saying in short that the models pictured above are Jane Hoffman, Elizabeth of Toro, Daphne Maxwell, and Jolie Jones, the first black *models* to appear on mainstream magazine covers. It just happened that all the covers appeared in 1969. Fun fashion fact! Ally, e-mail me at thefashionbomb@gmail.com to claim your prize!
For more details, click on comments.
And thanks to Make Fetch Happen for the pix!