Boek Hedging : a practical conservation handbook Alan Brooks (Samensteller), Roy Allitt (Illustrator), Andy Follis (Illustrator) Uitgever British Trust for Conservation Volunteers (1980) Taal Engels Serie Conservation handbooks Boek Dry stone walling : a practical conservation handbook Alan Brooks (Samensteller), Roy Allitt (Illustrator) Uitgever British Trust for Conservation Volunteers (1978) Taal Engels Serie Conservation handbooks