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Creator
Crowell, H. H. (Hamblin Howes), 1913-
Remove constraint Creator: Crowell, H. H. (Hamblin Howes), 1913-
Decade
1970-1979
Remove constraint Decade: 1970-1979
Resource Type
Technical Report
Remove constraint Resource Type: Technical Report
Subject
Snails -- Control
Remove constraint Subject: Snails -- Control