Atwater, Richard. Mr. Popper's penguins / by Richard and Florence Atwater ; illustrated by Robert Lawson. - Boston : Little, Brown and Co., 1938. - 138 p., [12] leaves of plates : ill ; 22 cm. "Newberry honor book." LCCN: 38027840 Subjects--Topical Terms: Penguins--Juvenile fiction. LC Class. No.: JUV PZ 10.3 .A89 / Mi