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Historical Patterns of Vagrancy by Blue-Gray Gnatcatchers in New England (Patrones Históricos de Movimientos Errantes de Individuos de Polioptila caerulea en New England)
Czecho-Slovak Society of Histochemistry and Cytochemistry on Basic, Applied and Diagnostic Histochemistry with Interna-tional Participation will be held in Olomouc (Czech Republic)