select distinct paper from paper_master,printsize_master,stamps where stamps.paper_code=paper_master.paper_code and paper_master.paper<>' '  and year(stamps.issue_date)=1981 and month(issue_date)=7  and printsize_master.printsize_code=stamps.printsize_code and printsize_master.printsize=\'3.70 X 2.4\'  and stamps.serial_no=\'1011\'  order by paper