Srivastava, U. S., & Srivastava, P. D. (1961). On the Hydrogen-Ion Concentration in the Alimentary Canal of the Coleoptera. Beitr├Ąge Zur Entomologie = Contributions to Entomology, 11(1-2), 15-20. https://doi.org/10.21248/contrib.entomol.11.1-2.15-20