1969. No Edition Remarks. 163 pages. No dust jacket. This is an ex-Library book. Blue cloth. Library copy, with expected inserts, stamps and inscriptions. Full title: Equilibrium Behaviour of Population Genetic Models with Non-Random Mating. Severe cracking to hinges causing boards to be loose. Pages are lightly tanned throughout. Boards have light shelf-wear with corner bumping. Light sunning to spine and edges with crushing to spine ends. Slight staining overall.