Title Authors Year
Bryophytes and heavy metals: a literature review

Tyler, G.…

1990
Decline of the natterjack toad Bufo clamita in Britain: Paleoecological, documentary and experimental evidence for breeding site acidification

Beebee, T.J…

1990
Forest soil chemical changes between 1949-50 and 1987

Billett, M.…

1990
Calculated rates of soil acidification of intensively used grassland in the Netherlands.

Oenema, O…

1990
Environmental Health Criteria 86 Mercury- Environmental Aspects

WHO,

 		1989
Water and the Environment. Circular 7/89

Department…

1989
Surface Waters (Dangerous Substances) (Classification) Regulations No 2286

HMSO,

 		1989
The comparative chemistries of platinum group metals and their periodic neighbors in marine macrophytes

Yang, J. S…

1989
Long-term change in the suitability of welsh streams for dippers Cinclus cinclus as a result of acidification and recovery: A modelling study.

Ormerod, S.…

1989
Statutory Instrument (1989): The Sludge (Use in Agriculture) Regulations

HMSO,

 		1989