Mathilde Kemp, et al. “A Comparison of Mollusc Diversity Between the Relatively Pristine Marico River and the Impacted Crocodile River, Two Major Tributaries of the Limpopo River, South Africa”. Water SA, vol. 42, no. 2 April, Apr. 2016, https://doi.org/10.4314/wsa.v42i2.09.