$CRK SEC Filings

Filing Filed On
PRIMARY DOCUMENT 18 Dec 2006
PRIMARY DOCUMENT 18 Dec 2006
PRIMARY DOCUMENT 18 Dec 2006
PRIMARY DOCUMENT 18 Dec 2006
PRIMARY DOCUMENT 18 Dec 2006
PRIMARY DOCUMENT 13 Dec 2006
PRIMARY DOCUMENT 13 Dec 2006
PRIMARY DOCUMENT 11 Dec 2006
PRIMARY DOCUMENT 11 Dec 2006
PRIMARY DOCUMENT 01 Dec 2006
PRIMARY DOCUMENT 01 Dec 2006
MAIN DOCUMENT DESCRIPTION 02 Oct 2006
MAIN DOCUMENT DESCRIPTION 05 Sep 2006
MAIN DOCUMENT DESCRIPTION 31 Aug 2006
PRIMARY DOCUMENT 11 Aug 2006
PRIMARY DOCUMENT 18 Jul 2006
PRIMARY DOCUMENT 03 Jul 2006
PRIMARY DOCUMENT 12 Jun 2006
PRIMARY DOCUMENT 05 Jun 2006
PRIMARY DOCUMENT 05 Jun 2006