Embryology of insects and myriapods: the developmental history of insects, centipedes and millepedes from egg desposition to hatching.
Johannsen, O. A.(Oskar Augustus),1870-1961.
Butt, Ferdinand Hinckley.
New York & London, 
1941.
Joint authors: Oskar Augustus Johannsen and Ferdinand Hinckley Butt.
[With a bibliography.]