Jack Harlan was a polymath. His life-long study of crop evolution combined plant sciences, archaeology, systematics, genetics, and conservation, leaving a legacy of five decades of influential publications that explored all aspects of crop plants – their origins, their dispersal, and their continued and future role in supporting the Earth’s burgeoning populations. To Harlan, agriculture was not...

introduction: quoting an article in well-known textbooks is held as a credit for that paper. the numbers of iranian publications mentioned in endodontic textbooks have increased during recent years. the aim of this investigation was to evaluate the number of iranian articles quoted in eminent endodontic text books. methods and materials: three known textbooks ( ingle’s endodontics, seltzer and ...