Appendix A. Shipping traffic (number of vessels) in the Great Lakes from 1959 to 2000. Christopher Costello John M. Drake David M. Lodge 10.6084/m9.figshare.3512906.v1 https://wiley.figshare.com/articles/dataset/Appendix_A_Shipping_traffic_number_of_vessels_in_the_Great_Lakes_from_1959_to_2000_/3512906 Shipping traffic (number of vessels) in the Great Lakes from 1959 to 2000. 2016-08-04 09:42:05 nonindigenous species ballast water environmental policy invasive species NIS maximum likelihood Environmental Science Ecology