The summer air-spora at Rothamsted in 1952.

@article{Gregory1957TheSA,
  title={The summer air-spora at Rothamsted in 1952.},
  author={P Heldt Gregory and J. M. Hirst},
  journal={Journal of general microbiology},
  year={1957},
  volume={17 1},
  pages={135-52}
}