I found another book you need to complete your collection:
Zimmerman, Jennie M.
Sparrow in the brush : collected poems
Don Blanding, illustrations and decorations.
[Los Angeles?] : Poets' Corners Press, [c1959]
90 p. : ill. ; 22 cm.
There are no copies of this book on the market, but four libraries
CALIFORNIA STATE UNIV, NORTHRIDGE
LOS ANGELES PUB LIBR
UNIV OF SOUTHERN CALIFORNIA
EASTERN OREGON UNIV
Another example of an author "borrowing" Don's illustrations after