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

Beattie, R.…

1991
Effects of sulphur dioxide on the development of fungal diseases of winter barley in an open-air fumigation system.

Mansfield,…

1991
Acid rain since 1985 - times are changing

Brydges, T.…

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

Pitcairn, C…

1991
Decline of ectomycorrhizal fungi in Europe.

Arnolds, E…

1991
Environmental Health Criteria 125 Platinum

WHO,

 		1991
Influence of HN3 and (HN4)2 SO4 on heathland vegetation

Van der…

1991
Physiological-effects of long-term exposure to low concentrations of SO2 and NH3 on poplar leaves

Hove, L.W.A…

1991
Effects of ionising radiation on aquatic organisms

National…

1991
The yield of winter cereals exposed to sulphur dioxide under field conditions.

McLeod, A.R…

1991