author = { Martinez, Patrick },

title = { The observer's guide to astronomy },

publisher = {Cambridge University Press},

keywords = { Astronomy Amateurs' manuals , Astronomy Observers' manuals , Astronomy },

year = {19XX-},

booktitle = {Practical astronomy handbooks ; 4},

address = { Cambridge },

url = { http://slubdd.de/katalog?TN_libero_mab2 }