Archive of genetically modified foods and crop and research industry. Wallace Collection, c. 1993 - 2004, comprising papers and 35 mm slides relating to the Plant Genetic Systems Trials, 1993 - 1996 and GM Farm Scale Evaluation Studies, 2000 - 2002; personal papers and pamphlets dealing with use of geneticaly modified organisms, biotchnology, supply chains and modified agricultural crops. Archive of genetically modified foods and crop and research industry