@book {Tinbergen 1900,
	title = {Des Coninx Summe. Inleiding},
	year = {1900},
	note = {Proefschrift Leiden.},
	pages = {VI-214},
	address = {Groningen},
	keywords = {Joannes de Brederode O.Cart.: Des coninx summe (expositio)},
	author = {D. C. Tinbergen}
}
