19. Wentzel, J., Stephens, J.C., Johnson, W., Menotti-Raymond, M., Pecon-Slattery, J., Yuhki, N., Carrington, M., Quigley, H.B., Miquelle, D.G., Tilson, R., Manansang, J., Brady, G., Zhi, L., Wenshi, P., Huang, S.-Q., Johnston, L., Sunquist, M.E., Karanth, K.U. & O’Brien, S.J. (1999) Subspecies of tigers: molecular assessment using ‘voucher specimens’ of geographically traceable individuals. Riding the Tiger: Tiger Conservation in Human-Dominated Landscapes (eds J. Seidensticker, S. Christie, & Peter Jackson), pp. 40–49. Cambridge University Press, Cambridge.