id	domain	url
alkej-749	doi.org	https://doi.org/10.22153/kej.2021.09.001
alkej-749	sumarsih07.files.wordpress.com	http://sumarsih07.files.wordpress.com/2008
alkej-749	salvinia.er.usgs.gov	http://salvinia.er.usgs.gov/html/identification
alkej-749	plants.ifas.ufl.edu	http://plants.ifas.ufl.edu/node/396
alkej-749	www.caslab.com	http://www.caslab.com/epa-method-8041