A 1/4 Cover My Favorite Martian Comic,

1/4 covers were from when unsold comics (or magazines) had to be returned and the ditributor didn't want to lug a bunch of pulp. The top 1/4 of the cover was submitted for the unsold credit. Needless to say they got sold and/or given away anyway.

Link to comic at pic, Nephews and Mrs. Browns!!