SAP BASIS FREE Study Materials PDF
https://drive.google.com/file/d/0B-jVC2odR624SVpBZVJoSE4wdzQ/view?usp=sharing
SAP BASIS and Security ADministration FREE PDF
https://drive.google.com/file/d/0B-jVC2odR624TndkQlpkNXE3azg/view?usp=sharing
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SAP BASIS Learning Guide