?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=Russell+Edward&rft.au=Naisbit%2C+Russell+Edward&rft.aulast=Naisbit&rft.date=2002&rft.title=Ecological+divergence+and+speciation+in+Heliconius+cydno+and+H.+melpomene&rft.inst=UCL+(University+College+London)&rft.tpages=197&rft.degree=Doctoral