By Reader's Digest
By Grundy, Peter, Maley, Alan
By Ivens, G.W.
By Ahn, Peter Martin
By Gibbon, D., Pain, Adam
By World Bank
By Moore
By Laogun, E
By Bollig, Michael, Schnegg, Wotzka, Hans-Peter
By David R. Harris, Gordon Hillman
By Ellis, Jackie
By Credland, Arthur G
By Arthur Wakefield, Brian Elliot
By Buckle, Catherine
By Lloyd, Richard
By Perucca, Fabien, Pouradier, Gerard, Perruca, Laredo, M.R.
By Carroll, John
By Williams, Michael, David
By Neville, Jayne
By William Howarth, C.P. Rodgers
By Bentley, Nicolas, Slater, Michael, Burgis, Nina
By Pearce, Fred
By Pozharskii, A.F., Soldatenkov, Anatoly T., Katritzky, Alan R.
By Willis, Douglas
By Kerr, Denny
By Okali, Christine, Sumberg, James, Farrington, John
By Christopher St. John Yates
By Roland, Arthur
By Shiferaw, Bekele, Freeman, H, Swinton, Scott