1. Introduction to Biostatistics;Bancroft,1959
2. Extraction and quantities of venom obtained from some Brazilian snakes;Belluomini,1968
3. Probable significance of venom yield record studies;Deoras;Mem. Inst. Butantan,1966
4. The Spearman - Karber method;Finney,1964
5. Yield of venom obtained from Crotalus atrox by electrical stimulation;Glenn;Toxicon,1972