TY - JOUR DA - 1976 LA - eng M2 - 372 PY - 1976 SN - 0044-3573 SP - 372-395 T2 - Zeitschrift für Tierpsychologie TI - Learning experiments on individual recognition in budgerigars (Melopsittacus undulatus) UR - https://nbn-resolving.org/urn:nbn:de:0070-bipr-28054 Y2 - 2024-12-26T20:07:49 ER -