?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Guswita&rft.au=Guswita%2C+Ira&rft.aufirst=Ira&rft.title=Kendala+Pengelolaan+Tanaman+Karet+di+Kenagarian+Koto+Tinggi+Kecamatan+Koto+Besar+Kabupaten+Dharasraya&rft.degree=Bachelor%2FSkripsi&rft.inst=Universitas+Negeri+Padang&rft.date=2012