Moravek Endre: Index acronymorum selectorum. Pars 7. Instituta communicationis (A MTAK kiadványai 47. Budapest, 1966)

- 110 NPRFCA National Petroleum Radio Frequency Co-ordinating Association, /US/ /е/ NPRR Northern Pacific Railroad, /US/ /е/ NP Ry Northern Pacific Railway, /US/ /е/ NPSB 1. News Print Service Bureau, /US/ /е/ 2. Naval Personnel Separation Center, /US/ /е/ NPTA National Postal Transport Association, /US/ /е/ NPU National Postal Union, /US/ /е/ NR 1. Naval Reserve, /US/ /е/ 2. Navy Regulations, /US/ /е/ NRA 1. Naval Reserve Association /е/ 2. Negro Radio Association, W /е/ NRAA National Railway Appliances Association, /US/ /е/ NRAB National Railroad Adjustment Board /е/ NR & HC = NRHC NRB Navy Reservation Bureau /е/ NRC National Roadside Council /е/ NRDFS Naval Radio Direction Finder Service, /US/ /е/ NRES Naval Receiving Station, /US/ /е/ N.R.G. Nederlandsch Radio Genootschap /пе/ NRHC National Rivers and Harbors Congress, W /е/ NRHS National Railway Historical Society /е/ N.R.I. Nationaal Radio Instituut, /Belgiê?/ /vi/ NRK Norsk Rikskringkasting /по/ NRL Naval Research Laboratory /е/ NRM National Railways of Mexico /е/ N.R.M.A. National Roads and Motorists' Association /е/ NRNY Navy Radio, New York /е/ NRPIO Naval Registered Publications Issuing Office /,US/ /е/ NRRL Norsk Radio Relae Liga, Os /по/ NRRS Naval Radio Research Station, /US/ /е/ NRS 1. Naval Radio Station, /US/ /е/ 2. Naval Receiving Station, /US/ /е/ 3. Navy Relief Society /е/ NRSL Navy Radio and Sound Laboratory, /US/ /е/ N.R.T.C. Nederlandsche Ruiter-Toeristen-Club /пе/