Federal archivists at the Clinton Presidential Library are blocking the release of hundreds of pages of White House papers on pardons that the former president approved, including clemency for fugitive commodities trader Marc Rich.

That archivists' decision, based on guidance provided by Bill Clinton that restricts the disclosure of advice he received from aides, prevents public scrutiny of documents that would shed light on how he decided which pardons to approve from among hundreds of requests.

Clinton's legal agent declined the option of reviewing and releasing the documents that were withheld, said the archivists, who work for the federal government, not the Clintons.

The decision to withhold much of the requested material could provide fodder for critics who say that the former president and his wife, Sen. Hillary Rodham Clinton, now seeking the Democratic presidential nomination, have been unwilling to fully release documents to public scrutiny.