Retina guide. 22nd ed, How to use the Retina I, Ia, Ib, IB, IBS, IF, II, IIa, IIc, IIC, IIF, IIS, IIIc, IIIC, IIIS, and Automatic I, II, III by Walter Daniel Emanuel. Published by Focal P in 1965. Publication and catalogue information, links to buy online and reader comments.