"Gazy usuwanie rozprawy akademickie." . . "Soil pollution." . . "Plants Effect of gases on." . . "Natural gas." . . "Rośliny skutki zanieczyszczenia." . . "Gleby zanieczyszczenie rozprawy akademickie." . . "Centrum voor Landbouwpublikaties en Landbouwdocumentatie." . . . . . "Effect of leaking natural gas on soil and vegetation in urban areas" . "Effect of leaking natural gas on soil and vegetation in urban areas"@en . . . . . . "Effect of Leaking Natural Gas on Soil and Vegetation in Urban Areas" . . . . . . . . . . . . . . . . . . . . . . . . . . . . .