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Over den oorsprong der Nederlandsche vlag
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Meteorological measurements in the upper air at station De Bilt, 1911-01-13 to 1923-12-31, ERA-CLIM ID 5013
Meteorological measurements in the upper air at station De Kooy, 1921-09-09 to 1923-12-18, ERA-CLIM ID 5006
Meteorological measurements in the upper air at station Duin Dal, 1916-07-19 to 1916-07-20, ERA-CLIM ID 5968A
Meteorological measurements in the upper air at station Soesterberg, 1916-03-02 to 1923-11-08, ERA-CLIM ID 5018A
Meteorological measurements in the upper air at station De Bilt, 1914-06-05 to 1921-09-07, ERA-CLIM ID 5969A
Meteorological measurements in the upper air at station De Bilt, 1914-06-05 to 1921-09-07, ERA-CLIM ID 5969B
Meteorological measurements in the upper air at station Soesterberg, 1916-03-02 to 1920-04-10, ERA-CLIM ID 5018B
Meteorological measurements in the upper air at station Soesterberg, 1911-06-09 to 1920-06-14, ERA-CLIM ID 5003A
Meteorological measurements in the upper air at station Soesterberg, 1913-02-12 to 1918-03-09, ERA-CLIM ID 5007A