Programming in COBOL /
Cobol programming /
COBOL programming : a structured approach /
Elements of structured Cobol programming.
Comprehensive structured Cobol. /
Structured Cobol : Flowchart Editio /
Cobol Programming a complete course in writing Cobol programs. /
Cobol for students /
Cobol for beginners /
Cobol for micros /
Advanced Cobol /
Cobol : programmierte Unterweisung /
Cobol-Fibel /
Structured Cobol : A Step by Step Approach /
COBOL : a practical approach /
COBOL : Funkční moduly jazyka /
A Guide to COBOL Programming
COBOL : [pro počítač] EC 1021 /
Programovací jazyk COBOL /
Programozás Cobol nyelven /
Crystal clear cobol : an introduction to cobol and structured programming /