Brill, K., Marmontel, M., Bolen-Richardson, M. and Stewart, R.E. 2016. Inter-lab comparison of precision and recommended methods for age estimation of Florida manatee (Trichechus manatus latirostris) using growth layer groups in earbones. NAMMCO Scientific Publications. 10, (Jun. 2016). DOI:https://doi.org/10.7557/3.3786.