TY  - BOOK
AU  - Cashell,G.T.Willoughby
AU  - Durran,Isobel M.
AU  - MacLellan,A.V.
TI  - Handbook of orthoptic principles 
SN  - 0443022003 
PY  - 1980///
CY  - Edinburgh, New York
PB  - Churchill Livingstone
KW  - Orthoptics
KW  - Handbooks, manuals, etc
N1  - Includes index
ER  -