@inproceedings{icrisat4661,
       booktitle = {Proceedings of the Fourth Regional Groundnut Workshop for Southern Africa},
            year = {1990},
           title = {Importance of Rotation with Groundnut for Cereal Productivity},
           pages = {137--141},
          author = {G Schmidt and E Frey},
             url = {http://oar.icrisat.org/4661/}
}