http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 volume (unpaged) : color illustrations ; 30 cm
In this picture book, a boy writes a letter to an imagined alien, explaining all the things he will need to know about Earth and the people who live here--and adding a postscript asking what the alien might look like.