Vol 1, Issue 2, 1991
TEODOR LIPPMAA – AN OUTSTANDING ESTONIAN ECOLOGIST; pp. 57–64
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HEAVY METALS IN SNOW AND SOME INDICATOR PLANTS IN ESTONIA; pp. 65–71
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A STUDY OF THE CONTENTS AND CONVERTIBILITY OF POLYCYCLIC AROMATIC HYDROCARBONS AND SULFUR IN LICHEN HYPOGYMNIA PHYSODES AND ITS SUBSTRATE; pp. 72–76
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LONG-RANGE TRANSPORT OF AIRBORNE POLLUTANTS AND THEIR WET DEPOSITION TO THE BALTIC SEA AND WEST-ESTONIAN ISLANDS IN 1985–1989; pp. 77–85
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QUANTITATIVE CHANGES OF WATER COMPOSITION IN LAKE PEIPSI-PIHKVA IN 1985–1989; pp. 86–92
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STANDARDIZATION METHODS OF TREE-RING CHRONOLOGIES; pp. 93–96
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TOLERANCE TO LOW PHOSPHORUS IN AN ANTHOCYANINLESS TOMATO VARIETY (LYCOPERSICON ESCULENTUM); pp. 97–98
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