TY - BOOK AU - Tracy,Kathleen TI - The railroad grows into an industry (1840-1850) T2 - The railroad in American history SN - 1612282881 (library bound) PY - 2013/// CY - Hockessin, Del. PB - Mitchell Lane Publishers KW - Railroads and state KW - United States KW - History KW - Juvenile literature KW - Railroads N1 - Includes bibliographical references and index ER -