VS COBOL II Language Reference
http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/handheld/Connected/BOOKS/IGYL1101/CCONTENTS?
VS COBOL II Programming Guide
http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/handheld/Connected/BOOKS/IGYA1101/CCONTENTS?


IBM COBOL Language Reference
http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/handheld/Connected/BOOKS/IGYLR105/CCONTENTS?
IBM COBOL Programming Guide
http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/handheld/Connected/BOOKS/IGYPG204/CCONTENTS?


ENTERPRISE COBOL Language Reference
http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/handheld/Connected/BOOKS/IGY3LR10/CCONTENTS?
ENTERPRISE COBOL Programming Guide
http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/handheld/Connected/BOOKS/IGY3PG20/CCONTENTS?