Betts, Elizabeth.
Outbreaks of the African migratory locust (Locusta migratoria migratorioides R. & F.) since 1871 / by Elizabeth Betts. - London : Anti-Locust Research Centre, 1961. - 25 p. : 9 maps. - Anti-locust memoir ; 6 .
Locusts--Africa.
Outbreaks of the African migratory locust (Locusta migratoria migratorioides R. & F.) since 1871 / by Elizabeth Betts. - London : Anti-Locust Research Centre, 1961. - 25 p. : 9 maps. - Anti-locust memoir ; 6 .
Locusts--Africa.