Map Symbols for Airport legend ?

[PROBERT68]

Hi,

When you have an airport  layer and in the table shows me they have  a field column called Type.  It will tell you what kind of airport it is... such as international, miltary, Municipal, Regional.  

So my question to people that work in airports industry or whoever, what is the national standard symbols for them to show in the Legend ?

I am trying to set it up that looks like here :  

Thanks