TY  - BOOK
AU  - Hans, Mary Rosamond,
TI  - The prehistory of languages
U1  - 410 
PY  - 1969///
CY  - Hague
PB  - Mouton
KW  - Protolanguages
KW  - Linguistic change
N1  - Includes bibliographical references ( p. 108 -114)
ER  -