4ème Colloque international des plastiques en agriculture.
Subtitle: 4th International Colloquium on Plastics in Agriculture.  Paris, juin 1970.
Publisher: Comité français des plastiques en agriculture
Published: 1971
Place of publication: [Neuilly-sur-Seine
Language: fre
Number of pages: 363
Subjects: Plastics in agriculture -- Congresses.
Notes: Includes bibliographies.
Cover title.
Papers in English, French, German or Italian with summaries in English and French.