The Instrument Procedures Handbook had a lot of great stuff as far as that. It explains how certain types of approaches give you 300 foot obstacle clearance, depending on if the nav source is on field (Like a VOR or NDB) or off field (Like a LOM used as an NDB approach), what the protected airspace dimensions are and secondary areas are.
It's pretty complicated and saves having to find the now hidden TERPs manual. I think it even goes into MLS, ASR, and PAR approaches.