The causative agent of Calcutta haemorrhagic fever: chikungunya or dengue.

@article{Sarkar1965TheCA,
  title={The causative agent of Calcutta haemorrhagic fever: chikungunya or dengue.},
  author={Jaladhi Kumar Sarkar and Satya N. Chatterjee and Samar K. Chakravarty and A. C. Mitra},
  journal={Bulletin of the Calcutta School of Tropical Medicine},
  year={1965},
  volume={13 2},
  pages={53-4}
}