@article{渡邊_1939, 
  title={135 土壌物理性の重要なる指標となる孔隙・粘土比 (pore space-clay retio) に就て}, 
  volume={13}, 
  DOI={10.20710/dojo.13.4_245_4}, 
  number={4}, 
  publisher={Japanese Society of Soil Science and Plant Nutrition}, 
  author={渡邊, 渡邊}, 
  year={1939}
  }