Alan Gilchrist: 3 books

How the human visual system determines the lightness of a surface, that is, its whiteness, blackness, or grayness, remains--like vision in general--a mystery. In fact, we have not even been able to create a machine that can determine, through an artificial vision system, whether an object is white,...

A practical guide to the construction of thesauri for use in information retrieval, written by leading experts in the field. Includes: planning and design; vocabulary control; specificity and compound terms; structure and relationships; auxiliary retrieval devices; multilingual thesauri; AAT Compound Term Rules. The US ANSI/NISO Z39.19 Thesaurus construction standard is also covered.

The Foetal Circulation is the culmination of many years of interest on the part of the author in the foetal circulation. Information is presented in three parts, all generously illustrated with drawings and diagrams made by the author. The first part describes the events which led up to his discovery...