Neutron vs. photon irradiation of inoperable salivary gland tumors: results of an RTOG-MRC cooperative randomized study. - Griffin,T.W.; Pajak,T.F.; Laramore,G.E.; Duncan,W.; Richter,M.P.; Hendrickson,F.R.; Maor,M.H. (Int J Radiation Oncology Biol Phys, 1988)