ABBEY, ALGAE, AMEBA, AMOEBA, BACTERIA, BLUE-GREEN, CONTRAST, CYANOBACTERIA, CYANOPHYTA, DIC, DIFFERENTIAL, GLONY, INTERFERENCE, JASNA, JASNY, KONTRAST, LEKKA, LEKKI, LEKKIE, LIGHT, MAGNIFICATION, MAJOR, MICHAEL, MICROGRAPH, MICROGRAPHY, MICROSCOPE, MICROSCOPY, MIKROSKOP, NIC, NOMARSKI, OF, OPACTWO, PROTOZOAN, SPIRULINA, SWIATLO, WITH, X125, Z,