Litecky, Charles R.
Structured COBOL: a step by step approach
McGraw-Hill , 1987
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Litecky, Charles R.
Structured Cobol: a step by step approach
McGraw-Hill, 1987
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Smith, Marilyn Z.
Standard Cobol: a problem-solving approach
Houghton-Mifflin, 1974
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Katzan, Harry, Jr.
A PL/I approach to programming languages
Auerbach, 1972
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Welland, Ray
Methodical programming in Cobol-85
Pitman, 1993
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