Cortina Method Books bring you the quick, easy and natual way to learn a new language. The Cortina method is time-tested and has received the approval of teachers, students, schools, colleges and business firms all over the world.

A pocket-sized word-finder just for Spanish speakers, this title features the 2500 most common words in English. Each entry includes translation, pronunciation and grammar usage. The introduction in Spanish explains the easy-to-use format. Useful appendices include common abbreviations, common English names, postal abbreviations, and a gazetteer. Este libro es convenientemente portable, y tiene cualidades especiales qu lo hacen muy útil. Por ejemplo, puesto que el volumen tiene 2500 palabras alfabéticamente ordenadas tan sólo las palabras inglesas esenciales -- usted podrá llevar consigo, a cualquier parte, esta guía manual y hallar prontamente la palabra que necesite. Otra cualidad especial es una transcripción fonetica de cada voz o palabra, representativa de los sonidos de la lengua español. Además de las 2500 voces del diccionario mismo, hallará usted una guía de pronunciación, listas de nombres communes, de abreviaciones, y un nomenclador geográfico. Las 2500 Palabras le serán sumamente valiosas para su estudio del ingles, no sólo como referencia sino también como librito compañero de viajes, allevar con usted dondequiera que vaya.

The book is composed of several articles that explore complexity in its most varied aspects. The solution of contemporary problems, whatever they may be, requires a multifaceted vision, far beyond the reductionist perspective. The study of complex systems, however, does not have the capacity to offer ready answers to the challenges of humanity. On the contrary, it points to the increase in uncertainty, the need to control variables, and uncertainty. This does not mean, therefore, that we should simply ignore the social, economic, and political phenomena that are all around us. What this book demonstrates is the importance of knowledge being disseminated, and it is imperative that different sciences exchange ideas, theories, and breakthroughs.