TY - JOUR DA - 1976 LA - eng M2 - 396 PY - 1976 SN - 0044-3573 SP - 396-408 T2 - Zeitschrift für Tierpsychologie TI - The influence of separation on the pair bond in budgerigars (Melopsittacus undulatus; Aves, Psittacidae UR - https://nbn-resolving.org/urn:nbn:de:0070-bipr-28068 Y2 - 2024-12-26T19:37:31 ER -