TY - BOOK AU - Gibbons,Gail TI - The post office book: Mail and how it moves AV - HE6371 .G5 1982 U1 - 383/.4973 19 PY - 1982/// CY - New York PB - Scholastic KW - Postal service KW - United States KW - Juvenile literature N1 - L ; 510 ; Lexile Adjusted ; L ; Raz-Plus; N2 - A step-by-step description of what happens to mail from the time it is deposited in the mailbox to its arrival at its destination. Also includes brief historical facts about mail service in the United States ER -