Subject ASC0003j35
Journal of the Royal Microscopical Society.
ser.2:v.1:pt.1:no.1-3 (1881), Page 119 (1878-1968.)
New York Botanical Garden, LuEsther T. Mertz Library
BHL Page 31227260
Keywords
royston-pigott transfer finder circle triangle disk general finder transfer finder eye-piece microscopy Royston-Pigott equilateral alphabet numbers