TY - CHAP AU - Hewitt, Godfrey AU - Barton, Nicholas H ED - Blackman, Roger ED - Ashburner, Michael ID - 4334 SN - 9-780-6320-0552-9 T2 - Insect Cytogenetics TI - The structure and maintenance of hybrid zones as exemplified by Podisma pedestris VL - 10 ER -