TY - RPRT TI - Crypthecodinium and Tetrahymena: an exercise in comparative evolution. AU - R M Preparata AU - C A Beam AU - M Himes AU - D L Nanney AU - E B Meyer AU - E M Simon PY - 1992 DO - 10.1007/bf00162970 UR - https://pubmed.ncbi.nlm.nih.gov/1588596/ ID - 1588596 ER -