Does anyone have any good links where I can find the documentation for 3D and 2D file formats specifically for Delphi(or Free Pascal even)?

2D file formats aren't as much trouble to find the documentation on, but the 3D ones I just can't seem to find anything on. I'm looking for as much documentation as I can for 2D and 3D formats so I can hopefully make a file conversion application.(All in Delphi or Free Pascal)

Any documents or stuff related to 2D/3D conversion or storage would be great.

Also, I wonder if this would be a good book to read? (as there aren't many resources on Open GL with Delphi)
Delphi Developer's Guide to OpenGL By Jon Q. Jacobs

Thanks for any help.