Retrieval and application of digital information resources Development and utilization of Web information resources Open access to digital information resources 并列题名：Development and utilization of Web information resources Research on planning, management and utilization of digital information resources 并列题名：Open access to digital information resources 并列题名：Research on planning, management and utilization of digital information resources Preparation and application of balance sheet of natural resources Principles and application of digital devices Practice and policy analysis of open public information resources