I'm just getting started in genealogy, so I want to be sure to start out with the correct source citations. I have a photocopy of a birth certificate for someone born in 1916. However, the Filed date is 1937. It says nothing about it being a delayed birth certificate. The birth certificate was certified and sent from the State of Colorado to the named person in 1950. I'm using EE p. 430 as my guide. Which year do I use, 1916, 1937, or 1950? Also, the File No. and Registered No. are both blank. I just put 'unnumbered' in place of the file number. Is there a better way of doing it?