Atomic resolution imaging of Langmuir-Blodgett highly-conductive, environmentally-stable organic films of charge-transfer salts has been obtained by scanning tunnelling microscopy (STM) showing their closely packed structure. By means of a comparative study with images of highly oriented pyrolytic graphite, the intermolecular distances have been calculated taking into account several types of measurement error. The structural data derived from STM have been compared with those obtained from electron diffraction studies. The electrical properties of these films together with the "read and write" capabilities of STM could provide a basis for fabricating nanoelectronic devices.