Select year in the menu below. You will be transported to the site of Natuurtijdschriften.nl where you can search for the subject you are looking for. You can search for author, family, species, country and so on. To the left you will also find a menu with authors, species and specific volume (“nummer”).
Thanks to Natuurtijdschriften.nl and Marcel Wasscher (who donated his copies of Notulae) for making it possible to upload all old issues for everyone to use freely.