@article {1251,
	title = {Donn{\'e}es pour un atlas des Hymenopteres de l{\textquoteright}Europe occidentale 11. Pemphredon (Sphecidae) from Belgium and elsewhere},
	journal = {Bull. Rech. agron. Gembloux},
	volume = {5},
	year = {1970},
	pages = {695-706},
	author = {Valkeila, E. and Leclercq, J.}
}
