Insect control (from 1958)

https://books.google.com/books?id=fN8DAAAAMBAJ&pg=PA129&lpg=PA129&dq=david+hewitt+mosquitoes&source=bl&ots=HIh5PHrv9z&sig=K0mMW4RU80ynsVtEdgi7zEBo-u8&hl=en&sa=X&ved=0ahUKEwi-ipeonvnQAhVLJcAKHcpSB2QQ6AEIJTAC#v=onepage&q=david%20hewitt%20mosquitoes&f=false

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