Introduction of apple trees free from all known virus diseases
Subtitle: [essays on the occasion of a] tree planting ceremony by Major the Rt. Hon. J.D. Chichester-Clark on Friday, 17th November, 1967.
Contributors: Northern Ireland. Ministry of Agriculture.
Publisher: [HMSO]
Published: 1967
Place of publication: [Belfast]
Language: eng
Other titles: Tree planting ceremony.