TY - BOOK AU - Mitchell, Robert L. AU - ED - ED - ED - ED - SN - 0471276405 (hardcover) SN - 2 PY - 1980///.;copyright 1980.46 CY - Chichester PB - John Wiley & Sons KW - KW - 2 KW - 0 KW - 6 KW - 20 KW - Economics.;Engineering economics N1 - A Wiley-Interscience publication.;Includes index; 5; Professional ER -