By Stern, Peter
By Bielenberg, Carl, Allen, Hugh
By Stephens, Tim
By Seethaler, Sherry
By Corrigan, Daniel P., Oksanen, Markku
By Smith, Keith
By Ramstorp, Matts
By Kybett, A P, Sherrington, David C
By Clark, James H., MacQuarrie, Duncan J.
By Errington, R. John
By Dickinson, Gordon, Murphy, Kevin
By Allaby, Michael
By Taylor, Ann, Brundtland, Gro Harlem
By Dorf, Richard C
By Jacobson, Mark Z.
By Stanton, Neville A., Salmon, Paul M., Rafferty, Laura A., Walker, Guy H.
By Handley, D., etc.
By Kenna, Jeff, Gillet, Bill
By Wenham, Stuart R, Green, Martin A, Watt, Muriel E, Corkish, Richard
By Ball, Colin
By Schouten, Ton, Smits, Stef
By Jon Ogborn, Mary Whitehouse
By Escritt, Leonard B.
By White, James Bernard
By Black, Maggie, Talbot, Rupert
By Sohail, M
By Welch, E
By Tooley, Mike
By Thomson, Ruth, Levy
By MARTINEZ–ALIER