This 186 page Monogram is a Unique History of the Pioneer Geneticists and their Studies of Chromosomes, Cytogenetics! It is well Documented with 13 pages of References, and also includes many Illustrations plus a 4 page Index. My copy has a Pristine Text, Tight, Like New Sewn Binding, and a Bright, Picturesque Cover: See My Photos! And, Please Note: My books come from 4 Generations of Family Collections(2 from Cal Tech)! These Treasures, typically, have remained as when first purchased: Even Vintage Classics purchased 100+ years ago! binel35