TY  - GEN
AU  - Butler, Norman,
CN  - QB88
ET  - Second edition.
ID  - 801061
KW  - Telescopes
LK  - https://univsouthin.idm.oclc.org/login?url=http://link.springer.com/10.1007/978-3-319-46789-4
SN  - 9783319467894
SN  - 3319467891
T1  - Building and using binoscopes /
TI  - Building and using binoscopes /
UR  - https://univsouthin.idm.oclc.org/login?url=http://link.springer.com/10.1007/978-3-319-46789-4
ER  -