@article{hashimoto_maniwa_1958, 
  title={Comparison between Survey map by 14.5kc Fish-finder and that by 200kc Fish-finder with Sharp Beam on Same sea}, 
  volume={19}, 
  DOI={10.9749/jina.19.0_23}, 
  publisher={Japan Institute of Navigation}, 
  author={Hashimoto and Maniwa}, 
  year={1958}
  }