A Child's Garden Of Verses Illustrated by Ruth Ruhman

This book is absolutely all i love !!! 
It's cute, colorful and from the mid-century !!!
This is my first Ruth Ruhman's book !!! I really would like to see other books by this illustrator !!! 
I made some research but i didn't find anything about Ruth Ruhman. 
If you know something, please let me know !!! :)