Jack mules get a good writeup in: “Physical and Biochemical Studies in Jack’s Semen,” Gupta, AK; Singh, R; Mamta; Singh, MK; Pal, Y. Annals of Arid Zone, 2008, vol. 47, no. 1, pp. 79-88. (Thanks to Tom Gill for bringing this to our attention.)
Jack mules get a good writeup in: “Physical and Biochemical Studies in Jack’s Semen,” Gupta, AK; Singh, R; Mamta; Singh, MK; Pal, Y. Annals of Arid Zone, 2008, vol. 47, no. 1, pp. 79-88. (Thanks to Tom Gill for bringing this to our attention.)