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Die Organisation des Heimatschutzes in Niedersachsen
Steilen, Diedrich, (1958)
The coasts of North-West England : report of the Regional Coastal Conference held in Preston on December 15th 1966
(1968)
Hedens Opdyrkning i Danmark : mindebog udg. ved oprettelsen af Kongenshus ; mindepark for hedens opdyrkere
Skodshj, Harald, (1953)
Alguns problemas da produção vegetal no Brasil
Duarte de Barros, Wanderbilt, (1960)
A erosão no Brasil
Duarte de Barros, Wanderbilt, (1956)
O problema do abastecimento alimentar
Duarte de Barros, Wanderbilt, (1964)