The Snellius-expedition in the Eastern part of the Netherlands East-Indies 1929-1930 under leadership of P.M. van Riel, director of the Amsterdam Branch Office of the Royal Netherlands Meteorological Institute

The Snellius-expedition in the Eastern part of the Netherlands East-Indies 1929-1930 under leadership of P.M. van Riel, director of the Amsterdam Branch Office of the Royal Netherlands Meteorological Institute