@misc{indiciae6af39b1c7b1f,
  title = {An improved volumetric impinger for pollen counting.},
  author = {H P MARX and J SPIEGELMAN and G I BLUMSTEIN},
  doi = {10.1016/0021-8707(59)90061-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/13620448/},
  note = {Source identifier: 13620448}
}