bonnus search - finding resources at the University of Bonn
In order to narrow the search to the Physics Library, in the search result page, go to the right column under "Bibliotheken Uni Bonn", and then click on the green plus sign in the line "Physik".
In order to find out the location, you should click on the "Exemplare Uni Bonn". There, shelf mark (e.g. "4.7 FEYNM") is indicated.
You can also search for articles in either printed or electronic journals by using this search function.
If you are interested in online accessibility or print holdings of a journal, it is more appropriate to use the item "Electronic Journals" (in the left menu of this page). There you can find the entry of a journal and also its "print availability" in more detail.