TY - JOUR T1 - Anisotropic ionizing radiation in NGC5252 JO - Nature UR - https://doi.org/10.1038/341422a0 PY - 1989/01/01 AU - Tadhunter C AU - Tsvetanov Z ED - DO - DOI: 10.1038/341422a0 PB - Springer Science and Business Media LLC VL - 341 IS - 6241 SP - 422 EP - 424 Y2 - 2025/11/19 ER -