Conclusions.
The Libraries from which I borrowed the greater part of the works
treating of the subject were:
The Royal Library at the Hague,
The Library of the Leiden University,
The Library of the Utrecht University,
The Library of the Groningen University,
The Library of the Amsterdam University,
The Library of the Royal University at Göttingen,
The Library of the Royal Zoological Society “Natura Artis Magistra” at
Amsterdam,
The Library of the Royal Academy of Sciences at Amsterdam,
The Library of the Museum of Natural History at Leiden,