TY - RPRT TI - Polytene chromosomes of Oxytricha: biochemical and morphological changes during macronuclear development in a ciliated protozoan. AU - B B Spear AU - M R Lauth PY - 1976 DO - 10.1007/bf00331828 UR - https://pubmed.ncbi.nlm.nih.gov/813980/ ID - 813980 ER -