TY - JOUR T1 - Ectoparasites of the House Martin, Delichon urbica in western Spain. 133, 41-48. JF - Entomologist's Monthly Magazine Y1 - 1997 A1 - Clark,Frank A1 - L. A. Hill SP - 41 EP - 48 VL - 133 ER - TY - JOUR T1 - The colonisation of artificial house martin nests by ectoparasites JF - Entomologist's Monthly Magazine Y1 - 1999 A1 - Clark,Frank A1 - L. A. Hill SP - 237 EP - 240 VL - 135 ER -