On the ecology of two varieties of Sonchus arvensis L.
By: Dirk Michiel Pegtel
Contributors: Rijksuniversiteit te Groningen
Publisher: VRB Drukkerijen
Published: 1976
Place of publication: Groningen
Language: eng
Number of pages: 148
Notes: Thesis (doctoral)--Rijksuniversiteit te Groningen, 1976.

Includes bibliographies.