Salida de campo a La Rubia, en Valladolid capital, el 22 de diciembre de 1953 (este dato podría ester equivocado, siendo 1952), de la que se anotó la observación de un Milvus milvus (Milano real) por Luis Valverde Gómez, hermano del autor.
Field trip to La Rubia, in the city of Valladolid, the 22nd of December of 1953 (this date could be wrong, being actually 1953), of which there was noted an observation of a Milvus milvus (Red Kite) by Luis Valverde Gómez, brother of the author.
