1. Macroscopic structure of hardwoods with terms, definitions and drawing;TRADA,1971
2. Timber. Its Structure, Properties and Utilisation;Desch,1996
3. Assessment of surface quality prior to adhesive bonding;AEA Technology,1995
4. Technology of Wood Bonding Principles In Practice;Marra,1992
5. Textbook of Wood Technology;Panshin,1980