Title Authors Year
Effects of sulphur dioxide on the development of fungal diseases of winter barley in an open-air fumigation system.

Mansfield,…

1991
A Field-Study of Fertilization and Embryonic Development in the Common Frog (Rana-Temporaria) with Particular Reference to Acidity and Temperature

Beattie, R.…

1991
Changes in species composition of semi-natural vegetation associated with the increase in atmospheric inputs of nitrogen

Pitcairn, C…

1991
Environmental Health Criteria 125 Platinum

WHO,

 		1991
Zeigerwerte von Pflanzen in Mitteleuropa

Ellenberg,…

1991
Effects of ionising radiation on aquatic organisms

National…

1991
The Distribution and Breeding Site Characteristics of Newts in Cumbria, England.

Denton, J.S…

1991
Conservation of freshwater fish in the British Isles: the current status and biology of threatened species. Aquatic Conservation

Maitland, P…

1991
Mechansims of adaptions of plants to acid soils

Marschner,…

1991
Effects of nitrogen loading on wetland ecosystems, with particular reference to atmospheric deposition

Morris, J.T…

1991