?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=George+L&rft.aulast=Chan&rft.au=Chan%2C+George+L&rft.date=1997&rft.inst=UCL+(University+College+London)&rft.degree=Doctoral&rft.title=Sex+ratio+evolution+and+resource+allocation+in+the+multiple-queen+ant+leptothorax+acervorum&rft.tpages=175