The Greek-English analytical concordance of the Greek-English New Testament

i met this man on my college campus right after this book came out. i was a leading greek student at the time and i was able to spend the nafternoon with him. he showed me this book and explained that there about 5500 greek words in the new testament. he had every word located in alphabetical order and every verse where it occured. it must have taken several years.
i remember being very impressed with him.