Links to HathiTrust digitized books are available only on the Boston University Libraries Search (BULS) records of print books the BU Libraries own.
For books/ebooks, filtering for "Available online" will not retrieve HathiTrust digitized books.
Digitized articles in library print journals may require finding the journals in HathiTrust. The easiest way to find a journal is by the ISSN found in a journal's record, e.g. Identifier ISSN: : 0003-9853. Use the filter for publication date of your article.
BULS - Boston University Libraries Search
BULS is a database containing books, ebooks, ejournals, book chapters, journal articles, newspapers,
images, videos and much more. To find the ones relevant to your topic, click on the logo.