Capital in the twenty-first century / Piketty, Thomas, 1971- author.

Conferences : a twenty-first century industry / Rogers, Tony.

Conferences : a twenty-first century industry / Rogers, Tony.

Preparing for the twenty-first century / Kennedy, Paul M. (Paul Michael), 1945-

Preparing for the twenty-first century / Kennedy, Paul M., 1945-

African universities in the twenty-first century / Zeleza, Paul Tiyambe, 1955-.

Deep ecology for the twenty-first century / Sessions, George, 1938-

Six billion plus : world population in the twenty-first century / Newbold, K. Bruce, 1964-

Japan in the twenty-first century : environment, economy, and society / Karan, Pradyumna P

Our final century : will civilisation survive the twenty-first crntury? / Rees, Martin J., 1942-

Environmental ethics : an overview for the twenty-first century / Attfield, Robin author.

Sociology and human rights : a Bill of Rights for the twenty-first century / Blau, Judith R., 1942-