So, you want some info to be with you all the time. Frequency data, range estimating, weather prediction, medical protocols, conversion tables and similiar. You can write it down manually into the notebook (and it is advantageously – you memorize it while writing), you can make your very own pocket sized reference handbook.
Format described will be 1/4 of common A4 sheet – A6. Total number of pages SHOULD be a multiple of eight. I.e. it MUST be divisible by eight. Entirely. Sorry for my English speech, i’m trying to describe it clear and loud.