Chrysanthemum Cinerariifolium

2 books
Pyrethrum flowersCharles B. Gnadinger
⏱ 2h 29m

Pyrethrum flowers

Charles B. Gnadinger

1975149 pp.
Pyrethrum, the natural insecticideInternational Symposium on Recent Advances with Pyrethrum the Natural Insecticide University of Minnesota 1972.
⏱ 5h 29m

Pyrethrum, the natural insecticide

International Symposium on Recent Advances with Pyrethrum the Natural Insecticide University of Minnesota 1972.

1973329 pp.