added mainEntity object, added @id for eachmajor major @type
added mainEntity object, added @id for eachmajor major @type

msulibrary/bib-template-fiction,msulibrary/bib-template-fiction,msulibrary/bib-template-textbook,msulibrary/bib-template-fiction,msulibrary/bib-template-textbook,msulibrary/bib-template-textbook