http://ccreweb.org/documents/parity/parity.html
At the end of the page:
Additional References
* Wu, C.S., Ambler, E., Hayward, R.W., D.D. Hoppes, and Hudson, R.P., Experimental test of parity conservation in beta decay, Physical Review, 105(4), 1957.
* Garwin, R.L., Lederman, L.M., Weinrich, M., Observations of the failure of conservation of parity and charge conjugation in meson decays : the magnetic moment of the free muon, Physical Review, 105(4), 1957.