TY - BOOK AU - Happel,John TI - Chemical process economics AV - HD9650.6 .H3 U1 - 658.15967 18 PY - 1958///] CY - New York PB - Wiley KW - Chemical industry KW - Mathematics KW - Chemische Verfahrenstechnik KW - swd N1 - Also issued online UR - http://www.archive.org/details/chemicalprocesse00happ UR - http://www.openlibrary.org/books/OL6247065M ER -