@book {8549,
	title = {van Den Broek},
	year = {2009},
	month = {2009///},
	publisher = {Nederlandse Dendrologie (14th ed.). K.N.N.V},
	organization = {Nederlandse Dendrologie (14th ed.). K.N.N.V},
	author = {J. De Koning}
}
@book {8550,
	title = {Nederlandse Dendrologie (13 e druk, geheel herzien)},
	year = {2009},
	month = {2009///},
	publisher = {Veenman \& Zonen, Ede},
	organization = {Veenman \& Zonen, Ede},
	author = {J. De Koning}
}
@book {8551,
	title = {Nederlandse dendrologie (13 e druk). H},
	year = {2000},
	month = {2000///},
	publisher = {Veenman \& Zonen, Ede},
	organization = {Veenman \& Zonen, Ede},
	author = {J. De Koning and J.W. Van den Broek and H.J. Van de Laar and G. Fortgens}
}
