WATER， AIR & SOIL POLLUTION 1998 Vol.107 No.1/4

1. Changes of Some Components of Precipitation in East Germany affer the 　 Unification∥E.BRUEGGEMANN.-p1 2. Soluble Carbohydrates and Secondary Phytochemicals in BETULA as　　　　 　 Affected by SO↓2-Pollution∥A.LAVOLA.-p25 3. Behaviour and lmpact of Cow Slurry Beneath a Storage Lagoon: 1.　　　　 　 Groundwater Contamination 1975-1982∥P.J.A.WITHERS.-p35 4. Behaviour and lmpact of Cow Slurry Beneath a Storage Lagoon: Ⅱ:　　　　 　 Chemical Composition of Chalk Porewater after 18 Years∥D.C.Gooddy.-p51 5. Bacteriological Changes Associated with Granular Activated Carbon in a　 　 Pilot Water Treatment Plant∥H.TAWFIK EL-ZANFALY.-p73 6. Bionutrient Removal with a Sequencing Batch Reactor∥R.O.MINES Jr.-p81 7. A Classification of Sediment Types Based on Statistical Multivariate　　 　 Techniques∥M.M.JORDAN.-p91 8. Nutrient Fluxes in Sediment (NH↓4↑+ and PO↓4↑-↑3) in N.W.Coastal　 　 Lagoon Mexico Associated with an Agroindustrial Basin∥G.DE LA LANZA　　 　 ESPINO.-p105 9. Nitrogen Deposition and Strategies for the COntrol of Acidification　and 　 Eutrophication Across Great Britain∥S.E.METCALFE.-p121 10.Uranium Solubility of Carbonate-Rich Uranium-Contaminated Soils∥M.P.　 　 ELLESS.-p147 11.Number of Samples Required for the Esti-mation of Residual Soil　Nitrate 　 -Nitrogen: a Risk Based Analysis∥R.S.KANWAR.-p163 12.Contemporary Flux of Radionuclides to Contaminated Saltmarshes in the　 　 Esk Estuary， Cumbria∥S.B.BRADLEY.-p175 13.Responses of Selected U.S.Gulf Coast Marsh Macrophyte Species to　Oiling 　 and Commercial Cleaners∥S.R.PEZESHKI.-p185 14.Fluorocarbons and Sulfur Hexafloride (SF↓6): a Methodology for　　　　 　 National Emission lnventories and Scenarios Applied to the Netherlands∥ 　 C.KROEZE.-p197 15.Effects of Nitrogen Fertilization on Stream Chemistry of Japanese　　　 　 Forested Watersheds∥K.OHRUI.-p219 16.PCB in a River System During Sediment Remediation∥G.BREMLE.-p237 17.Studies on the Phase Mineralogy and Leaching Characteristics of Coal　　 　 Fly Ash∥S.KHANRA.-p251 18.Influence of Sediment Preser-vation on Total Mercury and Methylmercury　 　 Analysis∥B.B.M.MUHAYA.-p277 19.An Analysis of the Representative Composition of Rainwater at Six　　　 　 Locations in Hong Kong∥R.SEQUEIRA.-p289 20.Met-al Pollution by Old Lead-Zinc Mines in Urumea River Valley (Basque　 　 Country， Spain)， Soil， Biota and Sediment∥J.SANCHEZ.-P303 21.Methane Emission of the Amsterdam Urban Area∥D.VEENHUYSEN.-p321 22.Nitrogen and Phosphorus Leaching from Fertilizer Applied on Golf　Course: 　 Lysimeter Study∥J.W.C.WONG.-p335 23.Evaluation of Tobacco Cultivars as Bioindicators and Biomonitors of　　 　 Ozone Phytotoxical Levels in Catalonia∥A.RIBAS.-p347 24.The Applicability of Peat and Needle Analysis in Heavy Metal Deposi-　　 　 tion Surveys∥H.VEIJALAINEN.-p367 25.Kinetic Analysis of Thermophilic Anaerobic Digestion of Wastewater　　　 　 Sludge∥I.M.ALATIQI.-p393 26.Effects of Landfill Gas on Growth and Nitrogen Fixation of Two　　　　　 　 Leguminous Trees (ACACIA CONFUSA， LEUCAENA LEUCOCEPHALA)∥Y.S. G. CHAN. 　 -p409 27.Measurements of Some Volatile Compounds by Means of the Electronic　Nose 　 ∥H.MARICOU.-P423