I have an NYC Mohawk and would like to have the rolling stock it's pulling to be historically accurate. So far I've been conservatively lining up only NYC freight cars behind it but I've seen pictures of NYC locomotives pulling various non-NYC freight cars as well. Wikipedia doesn't seem to have this information (as far as I can see). Does anyone know of a resource on the web that lists what freight car companies were affiliated with certain railway companies? I'm also looking for this sort of information on Union Pacific locomotives during the war years too.