Arnolds E.
Decline of ectomycorrhizal fungi in Europe. . Agriculture Ecosystems and Environment. 1991 ;35:209-244.
Ashmore MR.
Air pollution and agriculture. Outlook on Agriculture . 1991 ;20:139-144.
Ashmore MR, Wilson [E]RB.
Critical levels of air pollutants for Europe. London: Air Quality Division, Department of the Environment; 1994.
ATSD R.
Toxicological profile for cobalt. Atlanta, GA: gency for Toxic Substances and Disease Registry; 1992.