More treasures inherited by in-laws. #1 "Picnic Time" A3719 © NAPCO 1958 (Girl w/basket), #2 "Sue" A3152 © NAPCO 1958 - w/silver foil label that says "National Potteries Co, Cleveland, O, ©, Made in Japan" in shape of artist's palette (Girl w/hand in cookie jar) , #3 "School Days" A3719 © NAPCO 1958 - has NP Co silver foil label (Girl holding book & umbrella), #4 "Pat" A3162 © NAPCO 1958 - has silver label and also has a gold foil hanging tag in shape of artist's pa latte that says "Americana Figurines Hand Decorated By Norton" (Girl feeding kitty w/baby bottle). Where can I find site or book about these figurines and estimated values. All are in pristine condition. Thanks!