PT  - JOURNAL ARTICLE
AU  - Wible, Brad
TI  - Crossing borders along an endless frontier
AID  - 10.1126/science.356.6339.694-a
DP  - 2017 May 19
TA  - Science
PG  - 694--694
VI  - 356
IP  - 6339
4099  - http://science.sciencemag.org/content/356/6339/694.1.short
4100  - http://science.sciencemag.org/content/356/6339/694.1.full
SO  - Science2017 May 19; 356