@article {204,
	title = {Parasitoids of the spiny blackfly introduced},
	journal = {Inligtingsbulletin, Instituut vir Tropiese en Subtropiese Gewasse},
	volume = {No 255},
	year = {1993},
	pages = {1},
	author = {Berg, M.A. van den and Beer, M. de and Maritz, M.}
}
@article {207,
	title = {Classical biological control of the spiny blackfly on citrus},
	journal = {Inligtingsbulletin, Instituut vir Tropiese en Subtropiese Gewasse},
	volume = {No 293},
	year = {1997},
	pages = {13-16},
	author = {Berg, M.A. van den and Greenland, J.}
}
