Silson, Roy G. — Additive gene systems: an explanation for problems in evolution and selection.

Tring: Greenfield Publications, 1988. First Edition. Hardcover. Clean hardback tightly bound in red leatherette with gilt titles, signed dedication from the author on front endpaper otherwise no inscriptions, appears little used. 312 pages, 10 illustrations, 16 tables, references, index. Very Good with No dust jacket as issued.