TY - BOOK ID - 128719578 TI - Signals for survival AU - Tinbergen, Niko AU - Falkus, Hugh AU - Ennion, Eric Arnold Roberts PY - 1970 SN - 0198573499 PB - Oxford : Clarendon press, DB - UniCat KW - Lesser black-backed gull. KW - Animal communication. KW - Birds KW - Behavior. UR - https://www.unicat.be/uniCat?func=search&query=sysid:128719578 AB - ER -