Criptología digital (Digital Cryptology)

MANUAL FOR COMMUNITARIAN SOCIAL WORK - This book is a basic document for students and professionals of the different disciplines of Social Sciences related to community action: social workers, socio-cultural animators, social educators, psychologists, etc., who want to develop their professional activity in this collective ambience, professionals who believe in what they do and why they do it, and who are willing to accompany the community and its members in a process of change and growth.

Manual de campo para descubrir aves y pájaros. Observar y reconocer las aves en su medio natural, en libertad, diferenciarlas por el color y forma de su plumaje, por la silueta que tienen en vuelo o por su canto es una experiencia magnífica para realizar en familia, durante cualquier estación del año y en cualquier lugar de la península Ibérica. Esta guía de aves y pájaros presenta las 50 variedades de aves más comunes en nuestros humedales, bosques y riberas de ríos y estanques, litorales marítimos y extensas áreas de diferentes cultivos agrícolas, así como en algunas zonas...

Enter the world of oceans and the animals that live in them. Swim with jellyfish, wonder at the busy life of a seagrass meadow, and fence with narwhals. Fish, sharks, whales, and invertebrates swim through the pages of this colorful ocean book, which combines gorgeous illustrations and photos to help young enthusiasts learn all about the world's oceans. From glowing jellyfish to deep sea dwellers, they'll discover the incredible secret world of life under the sea. They'll also find out how they can help take care of the ocean themselves. Earth's Incredible Oceans, written by ocean expert Jess ...

How are crayons made? Clear wax is melted in a factory. Once it's melted, color is added to it, it is poured into crayon-shaped molds, cooled, and wrapped in a paper label. Sorted into sets, the brightly colored crayons are boxed and sent in trucks to stores to be sold to you.