参考书目中缺少 txfonts 和 XeLaTex 的特殊字符

Question

参考书目中不显示“ń”和“ł”等特殊字符。我检查了原始日志并发现了这一点：

• 缺少字符：ntx-Regular-tlf-t1 字体中没有 ł ("142)！
• 缺少字符：ntx-Regular-tlf-t1 字体中没有 ń（“144）！

这是代码：

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{newtxmath}
\usepackage{newtxtext}
\usepackage{biblatex}

\begin{filecontents*}{\jobname.bib}
@book{Wierzchon2018,
    author =    {Wierzcho{\'n}, S{\l}awomir T. and K{\l}opotek, Mieczys{\l}aw A.},
    title =     {Modern Algorithms of Cluster Analysis},
    series =    {Studies in Big Data},
    number =    {34},
    year =      {2018},
    publisher = {Springer International Publishing},
    address =   {Cham},
    isbn =      {978-3-319-69308-8},
    doi =       {10.1007/978-3-319-69308-8},
    url =       {https://doi.org/10.1007/978-3-319-69308-8},
}
\end{filecontents*}

\addbibresource{\jobname.bib}

\begin{document}

Correct:
Wierzcho{\'n} and K{\l}opotek \parencite{Wierzchon2018}

\printbibliography

\end{document}