TY - JOUR T1 - A NEW PROCEDURE FOR THE DETERMINATION OF THE CHROMATIC CONTRAST TRANSFER ENVELOPE OF ELECTRON-MICROSCOPES JO - OPTIK PY - 1993/05/01 AU - MOBUS G AU - RUHLE M ED - VL - 93 IS - 3 SP - 108 EP - 118 Y2 - 2025/01/13 ER -