You may also wish to search for items by McWilliams, A. and McWilliams.
Only one matching reference was found.
Edwards, D.O.; McWilliams, A.S.; Daunt, J.G., Phase separation in solid he3 + he4 mixtures, as shown by specific heat measurements, Phys. Rev. Lett., 1962, 9, 5, 195. [all data]