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2. Note de laboratoire: Contribution au captage et au dosage de NH3 gaseux et selsammoniacaux atmospheriques;Bourbon;Centre Belge d'Etude & Documentation des Eaux, No. 385,1975
3. Man-made airborne acidity and its determination;Brosset;Atmospheric Environment,1978
4. Results of the Tess-side investigation;Eggleton;Atomic Energy Research Establishment Harwell, AERE-R6983,1972
5. Calibration of collection procedures for the determination of precipitation chemistry;Galloway;Wat. Air and Soil Pollut.,1976