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Околна среда
Subtitle data: 1979
Year published: 1979 y.
Publishing house: КЕССИ;София
Pages: 227 с.
Libraries: NSI
Signature: 30/ХР1
Geographical concepts: България
Subject heading:
ОКОЛНА СРЕДА-ENVIRONMENT
Пресни водни ресурси-Fresh water resources
Иззета вода-Water abstraction
Използвана вода-Water use
Отпадъчни води-Waste water
Емисии на вредни вещества-Emission of contaminants
Битови отпадъци-Municipal waste
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