Or for Italian:
I searched for the exact phrase to find a free, downloadable introductory aerodynamics article in Spanish/Italian. Here are the most relevant results currently available: aerodinamica basica pdf
If you are looking for a specific article (e.g., from a magazine like Revista de Aeronáutica y Astronáutica ), please provide the author's name or exact title . Otherwise, the university notes listed above are the most common and reliable free resources for basic aerodynamics. Or for Italian: I searched for the exact