@article{Wirths:299785,
      recid = {299785},
      author = {Wirths, Willi},
      title = {Versuch einer Nahrungsbilanz für die Weltbevölkerung},
      journal = {German Journal of Agricultural Economics/ Agrarwirtschaft},
      address = {1963},
      year = {1963},
      url = {http://ageconsearch.umn.edu/record/299785},
      doi = {https://doi.org/10.22004/ag.econ.299785},
}