Pitts, Gerald N. Essentials of COBOL programming : a structured approach / Gerald N. Pitts, Barry L. Bateman. - Rockville, MD : Computer Science Press, c1982. - ix, 145 p. : ill. ; 23 cm. ISBN: 091489434X Subjects--Topical Terms: COBOL (Computer program language) LC Class. No.: QA76.73.C25 / P57 1982 Dewey Class. No.: 001.64/24�19