This is likely an OCR (Optical Character Recognition) error or a shorthand citation for a specific volume and page range of a medical journal from 1913.

If it’s the medical citation, I can help you look for the specific 1913 article it refers to. Fjärrextrahering av komprimerade filarkiv

It often appears in papers discussing leukemia treatments or folic acid antagonists , citing earlier work from the early 20th century. 2. Compressed Data File

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