Hart, Helen Long. 1957. Hierarchical structuring of Amuzgo grammar. International Journal of American Linguistics 23. 141-164.
@article{sinnemakizeromarking-Hart1957, author = {Hart, Helen Long}, journal = {International Journal of American Linguistics}, number = {3}, pages = {141-164}, title = {Hierarchical structuring of Amuzgo grammar}, volume = {23}, year = {1957} }