Wolff, Hans. 1959. Subsystem Typologies and Area Linguistics. Anthropological Linguistics 1. 1–88.
@article{wolff1959,
author = {Wolff, Hans},
journal = {Anthropological Linguistics},
number = {7},
pages = {1–88},
title = {Subsystem Typologies and Area Linguistics},
volume = {1},
year = {1959}
}