volunteered geographic information(VGL) in theory and practice 众包地理知识：志愿式地理信息理论与实践：volunteered geographic information(VGL) in theory and practice Personal information management theroy and practice Science communication in theory and practice 并列题名：Personal information management theroy and practice Cluster innovation theory and practice Steiner education in theory and practice Industrial innovation theory and practice Internal branding in theory and practice Structuring design：Graphic grids in theory and practice