My mum's birthday

Esta obra está dirigida a cualquier persona interesada en cuidar y preservar adecuadamente objetos de papel como libros, cómics, fotos, grabados, acuarelas y dibujos sobre papel, carteles, sellos, postales y mapas, entre otros. Se trata de una guía práctica ilustrada, de fácil manejo pero rigurosa en la información, realizada por restauradores especializados en papel, que enseña las características más importantes del papel, los principales tipos de papel, los deterioros más frecuentes que afectan a este material y cómo solucionarlos mediante la aplicación de sistemas sencillos de ...

Did you know that the first wheel was not invented for transportation or that the system used to create computers was based on the functionality of a sewing machine? In a fun way, this book teaches the history behind inventions that have changed the way we live, from Ancient Mesopotamia to the present. Important details appear at the bottom of each page, including the name of the inventor, the time period, and the place where it occurred.

Looking at POLAND: Did you know that more horses are raised in Poland than in any other European country? Looking at Poland, you will see the steep slopes of the Carpathian Mountains, the patchwork farmland of the central plains, and the crystal-clear lakes that dot the north. Learn about life in Poland, from shipyards to salt mines and from cottages to castles.

Introduces the life and times of Underground Railroad and anti-slavery leader Harriet Tubman and explains her place in American history.