@article{Plane1991,
author = {Plane, D.A. and Rogerson, P.A.},
title= {Tracking the baby boom, the baby bust, and the echo generations: How age composition regulates US migration},
year = {1991},
doi = {10.1111/j.0033-0124.1991.00416.x},
journal = {The Professional Geographer },
volume = {$§},
number = {$},
pages = {$!&--$§=},
}