Further reading

Information on the 1990 Nobel Prize in Physics (press release), The Royal Swedish Academy of Sciences.

Close, Frank: The Cosmic Onion. Heinemann Educational Books Ltd 1985, Chap. 6.

Kendall, Henry W. & Panofsky, Wolfgang: The structure of the proton and the neutron. Scientific American, June 1971, Vol 224, No 6, page 60.

Lederman, Leon M. & Schramm, David N.: Experimental verification of quarks. From Quarks to the Cosmos. Scientific American Library 1989.