ID:DA07873767
Crowson, Roy A.
Crowson, Roy Albert
Crowson, Roy A. (Roy Albert)
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R.A. Crowson
Academic Press 1981
Available at 17 libraries
R. A. Crowson
E. W. Classey 1967
Available at 4 libraries
by R. A. Crowson
Royal Entomological Society 1956 Handbooks for the identification of British insects v. 4, pt. 1
Available at 3 libraries
Nathaniel Lloyd 1955
Available at 1 libraries