You can find similar archival numbering in the Istanbul University Academic Archive. 2. Medieval Spanish Literature (Gonzalo de Berceo)
38b refers to a specific stanza or folio within the manuscript transmission (often the "F" manuscript). Lv 38b 52 jpg
(like a needle or carved bone) against a neutral background with a scale bar, it is the archaeological plate . You can find similar archival numbering in the
Plate 38b in these contexts often depicts bone artifacts or ivory carvings from the Late Antique period (4th–5th century AD), such as decorative pins or small tools. Lv 38b 52 jpg