并列题名：Research on legal system of digital publishing at home and abroad Research on legal system of digital publishing at home and abroad 并列题名：Research on legal system of digital publishing copyright protection Research on legal system of digital publishing copyright protection 并列题名：Research on legal system of futures and options markets 并列题名：Research on the legal aspects of digital publishing 并列题名：Research on legal system of housing right security in China 并列题名：Research on legal system of patent transaction 并列题名：Research on legal system of Russian foundation for basic research 并列题名：Research on the legal system of certified public accountant