TY - RPRT TI - A pseudogene for human U4 RNA with a remarkable structure. AU - K Hammarström AU - G Westin AU - U Pettersson PY - 1982 DO - 10.1002/j.1460-2075.1982.tb01239.x UR - https://pubmed.ncbi.nlm.nih.gov/6203736/ ID - 6203736 ER -