1. New perspectives on forest decline
2. N. M. Darrall (1992 ) Measurements of photosynthesis and associated gas exchange parameters in Scots pine exposed to elevated levels of SO2and O3using the Liphook fumigation system. I. 1988-1990. results. Report no. TEC/L/0566/M92. National Power Technology and Environmental Centre, Leatherhead.
3. N. M. Darrall (1992 ) Measurements of photosynthesis and associated gas exchange parameters in Scots pine and Norway spruce exposed to elevated levels of SO2and O3using the Liphook fumigation system. II. 1989-1991.results. Report no. TEC/L/0567/R92. National Power Technology and Environmental Centre, Leatherhead.