TY - RPRT TI - [Optimal magnification ratio for direct macroradiography studies with modulation transfer function (MTF). Studies on enlargement radiography. 37]. AU - Y Ayakawa AU - S Sakuma AU - H Okumura PY - 1967 UR - https://pubmed.ncbi.nlm.nih.gov/5238951/ ID - 5238951 ER -