@article{journal,
author = {Ena, V. and Mart{\'i}nez, A.},
title = {Fertilidad de la Avutarda (Otis tarda L.) en Villaf{\'a}fila (Zamora) en 1984},
year = {1985},
volume = {9},
pages = {325--329},
journal = {Miscel·l{\`a}nia Zool{\`o}gica},
keywords = {Fertility, Great bustard, Otis tarda, Spain}
}