TY - BOOK ID - 130466662 TI - Elementary structured COBOL : a step by step approach AU - Davis, Gordon Bitter AU - Litecky, Charles R. AU - Olson, Margrethe H. PY - 1977 SN - 0070157820 9780070157828 PB - New York: McGraw-Hill, DB - UniCat KW - COBOL (Computer program language) UR - https://www.unicat.be/uniCat?func=search&query=sysid:130466662 AB - ER -