Fast way to retrieve a range of data

[Nicolas Cueto]

Given a text field ("Vocabulary Indices") of tab-delimited data whose cr
lines are organized ascending-numeric first by Column 1 ("Textbook Level" =
1, 2, or 3) then next by Column 2 ("Page Number" = 1 to 200), what are fast
ways of retrieving, say, all the cr lines for Textbook Level = 2, Page
Number = 54?

Thank you.

--
Nicolas Cueto