@article{Yong-Bo Liu and Qi-Bin Zhang:144, author = {Yong-Bo Liu and Qi-Bin Zhang}, title = {Growth Rings of Roots in Perennial Forbs in Duolun Grassland, Inner Mongolia, China}, publisher = {J Integr Plant Biol}, year = {2007}, journal = {Journal of Integrative Plant Biology}, volume = {49}, number = {2}, eid = {144}, numpages = {5}, pages = {144}, keywords = {China; growth ring; herb-chronology; perennial forbs.}, url = {https://www.jipb.net/EN/abstract/article_22483.shtml}, doi = {10.1111/j.1744-7909.2007.00426.x} }