Ashalakshmi, C. N., Thomas, A. P., & Usha, K. (2015). A study on the toxic effects of ethion,an organophosphorous pesticide on earthworm perionyx ceylanensis Michaelsen 1903: An analytical approach.

Ashalakshmi, C N., A P. Thomas, and K. Usha. A Study on the Toxic Effects of Ethion,an Organophosphorous Pesticide on Earthworm Perionyx Ceylanensis Michaelsen 1903: An Analytical Approach. Kottayam, School of Environmental Science, M G University, 2015.

Ashalakshmi, C N., et al. A Study on the Toxic Effects of Ethion,an Organophosphorous Pesticide on Earthworm Perionyx Ceylanensis Michaelsen 1903: An Analytical Approach. 2015.