Architecture of the IBM System/360, G. M. Amdahl, G. A. Blaauw, F. P. Brooks Jr., IBM J. Res. Develop. Vol. 8, No. 2, 1964. An introduction to the 360 architecture is available from bitsavers.org: Mirrored HERE.
You must also:
Write one paragraph about paper #1, one paragraph comparing the systems in papers #2 and #3.
To be completely clear: this is 2 paragraphs.