You can read the OHO essays online in your browser or download a PDF. At the top of each essay, just under the grey title box, you will see "View PDF." Click the link to navigate to a downloadable PDF preview.
Whether you read in a browser or in PDF, each article includes page numbers. For example, in the third paragraph of the essay "Hebrew, Aramaic, and Greek in the Qumran Scrolls," you can see (p. 352),indicating that the word before it is on page 351 and the word after it is the first word of page 352.