2006 · Natalie Geen, Chris Firth · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture) · 9
2008 · Schmutz, Dr Ulrich, Rayns, Dr Francis, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture) · 2
2002 · Mark Hesketh, Chris Firth, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture) · 2
2006 · Chris Firth, Lois Philipps, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture) · 1
2006 · Chris Firth, S. Cubison, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture) · 1
1999 · Chris Firth, Margi Lennartsson · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture) · 1
1997 · J. R. Bevan, Chris Firth, et al. · Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture) · 1