?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=K.B.&rft.aulast=Wilson&rft.au=Wilson%2C+K.B.&rft.title=Ecological+dynamics+and+human+welfare%3A+a+case+study+of+population%2C+health+and+nutrition+in+Zimbabwe&rft.tpages=664&rft.date=1990&rft.inst=University+of+London&rft.degree=Doctoral