. . "Federal income taxation of mortgage backed securities"@en . "Federal income taxation of mortgage backed securities" . "Federal income taxation of M-B S" . . . . "Federal income taxation of M-B S"@en . "Federal income taxation of mortage backed securities" . . . . "The Federal income taxation of mortgage backed securities"@en . "Federal income taxation of mortgage-backed securities : a guide for issuers, investors, and sponsors"@en . . "Mortgage-backed securities"@en . "The federal income taxation of mortage backed securities" . . . . . . . "Taxation of mortgage backed securities"@en . . "Taxation of mortgage backed securities" . . . . . . . .