April McMahon, Robert McMahon “Language Classification by Numbers" Oxford University Press, USA (February 2, 2006) | ISBN: 0199279020 | 283 pages | PDF | 1,1 Mb
Shobhana L. Chelliah, Willem J. de Reuse, "Handbook of Descriptive Linguistic Fieldwork" English | 2010 | pages: 504 | ISBN: 9048190258, 9400792182 | PDF | 4,4 mb