By gestalten, Martin Raymond, Chris Sanderson, Future Laboratory
By Bagaria
By G. K. Pal, P. Pal
By Samuel Hahnemann
By J Wedley
By R. Cavallo
By World Health Organization(WHO)
By Food and Agriculture Organization of the United Nations
By Organization for Economic Co-operation and Development
By United Nations Environment Programme
By Kalbande
By Rajesh Daniel
By J Jobbins
By Catherine Parchment Smith, Claire Ritchie Chalmers
By Hayes, Thomas C.
By Huck & Pucker
By Dear, Peter
By Darwin, Charles, Browne, Janet, Neve, Michael
By Trill, J., Bowyer, Jack
By No Listed Author
By Flint, Colin, Taylor, Peter J.
By Roger Godement, Urmie Ray
By Davey, Patrick
By Giles Sparrow
By Steven Weinberg (University of Texas Austin)
By W.Stephen Waring, Philip D. Ambery
By Kevin Moore, Punit Ramrakha