TY - BOOK ID - 133512929 TI - Population losses in the mallard, black duck, and blue-winged teal / [by] Frank C. Bellrose and Elizabeth Brown Chase PY - 1950 PB - Urbana DB - UniCat KW - Ducks UR - https://www.unicat.be/uniCat?func=search&query=sysid:133512929 AB - ER -