OUTLINE: Randomized study. Arm I: Radiotherapy plus Single-Agent Chemotherapy. Irradiation of involved head and neck sites by external-beam radiotherapy (EBRT) alone (source not specified), brachytherapy alone (using permanent or removable radiation sources), or both; plus Mitomycin, MITO, NSC-26980. Arm II: Radiotherapy plus Single-Agent Chemotherapy. Radiotherapy as in Arm I; plus Porfiromycin, NSC-56410.