. 2022 Aug 5;19(15):9660. doi: 10.3390/ijerph19159660
© 2022 by the authors.
Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Figure 3.
The spatial evolution of the labor transer.