TY - RPRT TI - Routine patch testing with ether extract of Primula obconica. AU - G Agrup AU - S Fregert AU - N Hjorth AU - P Ovrum PY - 1968 DO - 10.1111/j.1365-2133.1968.tb12336.x UR - https://pubmed.ncbi.nlm.nih.gov/5675985/ ID - 5675985 ER -