Binoculars & telescopes for field work.
Edition: 4th ed.
Series: British Trust for Ornithology. Field guides;no.2
Publisher: British Trustfor Ornithology
Published: 1961
Language: eng
Number of pages: 22
Notes: Previously published (B60-9284) as 'How to choose and use field glasses', by E.M.Nicholson,1959.