Ciba-Geigy weed tables
by E. Häflinger, Josef Brun-Hool, J.R. Geigy, J.R. Geigy A.G.
WeedsIdentification
Writing a summary for young readers…
For young readers
Book data: Open Library
by E. Häflinger, Josef Brun-Hool, J.R. Geigy, J.R. Geigy A.G.
Book data: Open Library