1.
Meteorological measurements in the upper air at station St. Michel, 1917-09-30 to 1918-09-28, ERA-CLIM ID 4985
2.
Meteorological measurements in the upper air at station Soesterberg, 1913-02-12 to 1918-03-09, ERA-CLIM ID 5007A
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 Breedene, 1915-07-09 to 1917-05-25, ERA-CLIM ID 4984
Meteorological measurements in the upper air at station De Kooy, 1921-10-11 to 1923-12-27, ERA-CLIM ID 5005
Meteorological measurements in the upper air at station Duin Dal, 1916-09-06 to 1923-12-10, ERA-CLIM ID 5017
Meteorological measurements in the upper air at station E.L.T.A. Amsterdam, 1919-08-09 to 1919-09-11, ERA-CLIM ID 5966
Meteorological measurements in the upper air at station Bruxelles, 1920-01-02 to 1920-06-08, ERA-CLIM ID 5651