Borden's Irradiated Vitamin D Milk

N.pl: P.L. Co, 1940. Near-fine. Light toning, some light surface wear and tear to back panel. Folding illustrated advert for "Borden's Irradiated Vitamin D Milk", marketed to mothers of infants and small children as being packed with nutritious vitamins for the prevention of childhood diseases such as rickets. In this context, the term "irradiated" roughly means "pasteurized" or "sterilized". Features small cartoon anthropomorphized versions of each vitamin, with accompanying rhymes for each. Measures approx. 5.5" by 3.5" folded, 5.5" by 11" unfolded. The rhyme for "Vita-Man D":

Hello there, folks,
I'm "Sunny D"
Building bones
When sunlight's free.
On dark dull days
I always hide,
So why not take
Me in-- Inside?
Now mothers dear
And babies small
Have need of me
The most of all.
Drink milk each day
And healthy be,
Just ask for Borden's
Vita-Man D.