1.
Report on the organization and management of seven agricultural schools in Germany, Belgium, and England
2.
Nota toekomst Nederlandse infrastructuur voor auteursidentifiers
Novissima totius Lavsonii sive Lemani Lacus : cum Regionibus circumjacentibus Chorograhica Repraesentatio interquas interga Genevensis Republica Ducatusque Cablensis exhibentiur ut...
Belgian draft horses, 1931