Ken asked a question about finding Reference Sheets. Given that he had trouble, odds are others have the same question, so I will answer in public.
Since the ones Ken asked about are low numbers, the easy way to see all three is to go to the catalog and choose Reference Sheets. Then sort low to high and you will see them in numerical order; 1, 2, 3, etc.
The other way is to go to the catalog and search by number in the search box in top right corner of the page. Here you need to know the format which is, RSNNN where N is the number. Note that there is no space between letters and numbers, AND numbers less than 100 are zero filled. Reference Sheet 2 is thus RS002 for the search function.
Mac