TY - RPRT TI - Cobalt-60 teletherapy simulation device for simple treatment fields. AU - W J Walker AU - J L Campbell AU - R J Carella PY - 1974 DO - 10.1088/0031-9155/19/2/008 UR - https://pubmed.ncbi.nlm.nih.gov/4445203/ ID - 4445203 ER -