Advanced Structured Cobol Batch On-Line and Data-Base Concepts

Structured COBOL Programming for the AS400 by Robert A. Stern, Stern and Cooper

Cobol for the 21st Century by Robert A. Stern, Nancy Stern and James P. Ley...

Visual COBOL: A Developer's Guide to Modern COBOL

Modern COBOL Programming For Beginners - John Bailey

File and Data Base Techniques (Hrw - Hardcover, by Bradley James - Acceptable

COBOL II : Programming Techniques, Efficiency Considerations, Debugging

COBOL for the 21st Century Eleventh Edition by Stern, Stern, Ley Wiley Paperback