TY - RPRT TI - An energy filter for biological electron microscopy. AU - R M Henkelman AU - F P Ottensmeyer PY - 1974 DO - 10.1111/j.1365-2818.1974.tb03968.x UR - https://pubmed.ncbi.nlm.nih.gov/4374545/ ID - 4374545 ER -