DE ONG, ELEMER RALPHInsect fungus and weed controlInsect fungus and weed controlDe Ong, Elemer RalphÉditeur : Chemical Publishing coAnnée : 1953DisponibleAFTPVALire la suite...
Insecticides manual of specifications for insecticides and for spraying and dusting apparatusInsecticides manual of specifications for insecticides and for spraying and dusting apparatusÉditeur : World Health OrganisationAnnée : 1953DisponibleAFTPVALire la suite...