Microbial pest control agent : bacillus thuringiensis / publ. under the joint sponsorshipof the united nations environment programme the international labour organization and the world health organization,and produced within the framework of the inter-organization programme for the sound management of chemicals . - Geneva : World health organization, 1999 . - XV-105 p. : couv.ill ; 21 cm. - Environmental health criteria 217 0250863x .

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