26 Problemas resueltos de navegación astronómica para capitanes de yate

La reina, el rey y el peque o pr ncipe visitan a un ni ito un d a por la ma ana, pero l no est en casa. Por eso, al otro d a, vuelven acompa ados de un caballero, pero el peque o tampoco se encuentra. Cada d a se agrega un nuevo personaje a la comitiva que llega a buscar al ni o, hasta que, por fin, un domingo el chico recibe a toda la corte en su casa.

Families can be big or small, but all resemble each other in one aspect: they have a past and a present that, is also part of a broader history, that of a culture or race, or that of the world. The reader will see that family trees are used both by historians and everyday people who trace generations of relatives. Although family trees imply blood relations, the ties of love and friendship are often just as important.

Esta es la historia de una familia griega que ve como cambia totalmente su vida con la llegada de la segunda guerra mundial.

This complete Spanish translation of the highly acclaimed Isaac Asimov's 21st Century Library of the Universe is ideal for students still developing their English-language skills.