Hi Kaniz! Thank you for your reply - I appreciate your time and effort.
I tried the solution you suggested but incurred in the "Notebook not found" error (please see the attached image) because, I think, it is not possible to use * in the notebook path.
Again, from a notebook in the "src" folder (e.g. /src/etl_sql_query) I am trying to automatically import all notebooks stored in a "/src/etl_notebooks/" folder without typing each and every one of their path.