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Freshwater isopods (Asellidae) of North America
1972
Williams, W. D (William David)
Freshwater planarians (Turbellaria) of North America
1972
Kenk, Roman
Freshwater leeches (Annelida: Hirudinea) of North America
1972
Klemm, Donald J.
Crayfishes (Astacidae) of North and Middle America
1972
Hobbs, Horton H. (Horton Holcombe)
The freshwater amphipod crustaceans (Gammaridae) of North America
1972
Holsinger, John R.
Freshwater sphaeriacean clams (Mollusca: Pelecypoda) of North America
1972
Burch, J. B. (John Bayard)
The twelve-year-old son of a Union army doctor killed during the fighting in Fredericksburg comes to understand the meaning of war and the fine line between friends and enemies when he begins corresponding with a young Confederate prisoner of war.
Показать больше [+] Меньше [-]The genus Argulus (Crustacea: Branchiura) of the United States
1972
Cressey, Roger F.
Aquatic dryopoid beetles (Coleoptera) of the United States
1972
Brown, Harley P.
A comparative study of state water pollution control laws and programs
1972
Heath, Milton S., (Milton Sydney)
Air pollution effects on potato and bean in southern Michigan
1972
Hooker, W. J. | Yang, T. C. | Potter, H. S.
