Walker, Richard, 1951- Heart : how the blood gets around the body / Richard Walker. - Danbury, Conn. : Grolier Educational, 1998. - 48 pages : color illustrations ; 29 cm. - Under the microscope ; 1 . - Under the microscope (Danbury, Conn.) ; 1. . Includes index. ISBN: 0717292681 (v. 1) 0717292657 (set) LCCN: 98208540 Subjects--Topical Terms: Heart--Juvenile literature.Cardiovascular system--Juvenile literature.Blood--Circulation--Juvenile literature.Heart.Blood--Circulation.Circulatory system. Dewey Class. No.: R 612.1 W177 1998