%0 Generic %T State taxation the role of Congress in developing apportionment standards : hearing before the Subcommittee on Commercial and Administrative Law of the Committee on the Judiciary, House of Representatives, One Hundred Eleventh Congress, second session, May 6, 2010. %U https://ezaccess.libraries.psu.edu/login?url=http://search.proquest.com/congcomp/getdoc?HEARING-ID=HRG-2010-HJH-0007