With close to 100 million speakers, Tai-Kadai constitutes one of the world's major language families. Made up of two national languages, Thai and Lao, and the so-called 'nationality languages' that represent minority 'nationalities' officially recognized in the People's Republic of China, it is a language group of immense interest and significance. Despite this, no single volume covering the Tai-Kadai languages has existed until now, and both Thai and Lao, as well as the 'nationality languages', lack comprehensive, dependable and up-to-date reference grammars. Addressing this, "The Tai-Kadai Languages" provides the clear, grammatical descriptions needed in the area.A one-of-a-kind resource, it presents a particularly important overview of Thai that includes extensive cross-referencing to other sections of the volume, sign-posting to sources in the bibliography, and can be seen as an abridged reference grammar in itself. A parallel grammatical study of Lao is also included, as are discussions of the 'nationality languages', surveys of further languages in the family with smaller numbers of speakers, and sections dealing with topics of comparative interest. Much-needed and highly useful, "The Tai-Kadai Languages" is a key work for professionals and students in linguistics, as well as anthropologists and area studies specialists.

《十九世纪欧洲语言学史》详尽地介绍了西方比较语言学的兴起和发展，对于近代欧洲语言科学的发展、方法和成果做了综合的叙述介绍了欧洲古典时代、中世纪以及16，17，18世纪的语言学的演进，叙述了印欧语系各个语支以及世界各个语系的研究情形，并从碑铭与考古的发现情况对文字史进行了探讨，最后还讨论了比较语言学的方法论及其演进过程。作者严谨的科学态度，受到学界的赞许，文笔流畅生动，被中国语言学家朱德熙先生誉为“最好的一本介绍历史比较方法的书”。

巴克所着的《印欧语语汇比较词典》不仅是他最集中心血，也是受众面最广的著作，此书正文厚达1515页，按照语义分类，可以让读者快速获悉同源词在各种印欧语中的分布情况，提供了关于原始印欧人的环境、文化和制度的重要信息。
字典主体分为二十二个章节，分别是：1.物质世界；2.人类；3.动物；4.身体部分；5.食物和饮料；6.衣服装饰；7.住所；8.农业；9.技艺动作和制品；10.运动；11.财物；12.空间关系；13.数量；14.时间；15.感知；16.情感；17.思想；18.言语、阅读和书写；19.社会政治；20.战争；21.法律；22.宗教。每一章节内再细分为数个小章节。比如第一章物质世界就有土地、山、水、树木、日、月、风、云、烟等分类。在每一项语义词条下除了列举在各种语言中的形式外，还附有简短的语义解释和词源学讨论。