Structured Cobol : Flowchart Editio /
Comprehensive structured Cobol. /
COBOL programming : a structured approach /
Elements of structured Cobol programming.
COBOL : a practical approach /
ANS COBOL : a pragmatic approach /
Crystal clear cobol : an introduction to cobol and structured programming /
Cobol : programmierte Unterweisung /
Programming in COBOL /
Cobol for students /
Cobol programming /
Cobol for beginners /
Cobol for micros /
Advanced Cobol /
COBOL : Funkční moduly jazyka /
Cobol-Fibel /
Step by step
COBOL : [pro počítač] EC 1021 /
Ethnography : step-by-step /
Structured Cobol : A Step by Step Approach /