Welburn, Tyler. Structured COBOL : fundamentals and style / Tyler Welburn. - Palo Alto, Calif. : Mayfield Pub. Co., 1981. - xv, 534 p. : ill. ISBN: 0874845432 (pbk.) Subjects--Topical Terms: COBOL (Computer program language)Structured programming. LC Class. No.: QA76.73.C25 / W44 Dewey Class. No.: 005.13/3�19