TY  - JOUR
A1  - Liebherr, Helga
T1  - Markierung von Saat- und Bleßgänsen 1992 und 1993
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Rutschke, Erich
A1  - Liebherr, Helga
T1  - Bestand und Bestandsentwicklung einiger Wildentenarten in Ostdeutschland : Ergebnisse 25jähriger Wasservogelzählungen
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Hlinak, Andreas
A1  - Müller, Thomas
A1  - Kramer, Matthias
A1  - Mühle, Ralf-Udo
A1  - Liebherr, Helga
A1  - Ziedler, Klaus
T1  - Serological survey of viral pathogens in bean and white-fronted geese from Germany
Y1  - 1998
SN  - 0090-3558
ER  - 
TY  - JOUR
A1  - Rutschke, Erich
A1  - Liebherr, Helga
T1  - Gäste aus dem hohen Norden : neue Forschungsergebnisse zur Saatgans
Y1  - 1996
ER  - 
TY  - JOUR
A1  - Rutschke, Erich
A1  - Liebherr, Helga
T1  - Neue Erkenntnisse über die Wanderungen der Saatgans (Anser fabalis Latham)
Y1  - 1996
ER  - 
TY  - JOUR
A1  - Rutschke, Erich
A1  - Liebherr, Helga
T1  - Ergebnisse der Wasservogelzählungen in der Saison 1993/94 (neue Bundesländer)
Y1  - 1996
ER  - 
TY  - JOUR
A1  - Rutschke, Erich
A1  - Liebherr, Helga
T1  - Ergebnisse der Wasservogelzählungen in der Saison 1994/95 (neue Bundesländer)
Y1  - 1996
ER  - 
TY  - JOUR
A1  - Hlinak, Andreas
A1  - Müller, Thomas
A1  - Kramer, Matthias
A1  - Mühle, Ralf-Udo
A1  - Liebherr, Helga
A1  - Ziedler, Klaus
T1  - A descriptive analysis of the potenrial association between migration patterns of bean and white-fronted geese and the occurence of newcastle disease outbreaks in domestic birds
N2  - Sightings and migration patterns of 65 bean and 65 white-fronted geese are reported. These geese were tagged and serologically screened. 19 of the 53 birds sighted had serologic evidence of Newcastle Disease. The migration patterns of the wild geese provided further evidence that the main resting and wintering sites of migratory waterfowl are likely to be important for the inter- and intraspecies transmission of avian diseases.
Y1  - 1999
SN  - 0005-2086
ER  -