@article {44293, title = {Ectoparasites of the House Martin, Delichon urbica in western Spain. 133, 41-48.}, journal = {Entomologist{\textquoteright}s Monthly Magazine}, volume = {133}, year = {1997}, month = {1997}, pages = {41 - 48}, author = {Clark,Frank and L. A. Hill} } @article {44294, title = {The colonisation of artificial house martin nests by ectoparasites}, journal = {Entomologist{\textquoteright}s Monthly Magazine}, volume = {135}, year = {1999}, month = {1999}, pages = {237 - 240}, author = {Clark,Frank and L. A. Hill} }