You can use BrowZine to find journals in your subject area. Please note that BrowZine does not list all of Strathclyde's journals, but it is a useful way to identify key journals within a subject field.
Library books are arranged by the Dewey Decimal classification scheme whereby each subject is represented by a number.
You will find books on the same subject will have the same number. The shelfmark is preceded by the letter D and will be followed by 3 letters, which are usually the first 3 letters of the author's name.
e.g. D 320.9411 MACG
D 300 Social sciences (General)
D 320 Political science
D 320.6 Policy making
D 330 Economics
D 350 Public administration