What is the status of the Montessori Bibliography Online?

I periodically do an audit of the bibliography to gain an understanding of the extent of the coverage. Generally, I focus on 5 areas and for the most part the scope of these categories are self-evident, however there are some nuances to consider.

Type of entry refers to the type of material – journal article, book, book section, et cetera – in which the citation references.

Language of content refers to the language(s) which the referenced document is written. In some cases a document may be written in one or more languages.

Year of publication is pretty self-evident, this refers to the year in which the document was published. In some cases the date of publication is unknown or unidentified so this field is left empty.

Available or unavailable in digital form refers to whether the document is accessible digitally from a reputable and reliable source. This includes content that is freely available as well as content available behind a paywall.

Finally, tagged or untagged refers to whether I have completed a basic level of cataloging of the content. As I add content to the database I attempt to assign relevant tags – this has been a challenge to maintain or sustain.

As of September 27, 2023 – 43,613 unique entries

Type of entry

Type Quantity Percent
Book 3,651 8.37 %
Book section 2,778 6.37 %
Journal or magazine article 33,692 77.25 %
Manuscript of archival collection 429 0.98 %
Newspaper article 1,153 2.64 %
Thesis or dissertation 1,354 3.10 %
Other 556 1.27 %
“Other” is a combination of types which individually make up less than 0.5% of the entire dataset. These types include: audio recording, blog post, conference paper, dataset, dictionary entry, document, encyclopedia article, interview, patent, presentation, report, video recording, and web page.

Language of content

Language Quantity Percent
Dutch 3,332 7.64 %
English 26,992 61.89 %
French 572 1.31 %
German 2,803 6.43 %
Hungarian 298 0.68 %
Italian 6,306 14.46 %
Japanese 890 2.04 %
Korean 352 0.81 %
Spanish 552 1.27 %
Swedish 230 0.53 %
Other 1,379 3.16 %
“Other” is a combination of languages which individually make up less than 0.5% of the entire dataset. These languages include: Afrikaans, Arabic, Bosnian, Catalan, Chinese, Croatian, Czech, Danish, Estonian, Finnish, Galician, Greek, Gujarati, Hindi, Icelandic, Indonesian, Latin, Latvian, Lithuanian, Malay, Marathi, Norwegian, Persian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Tamil, Thai, Turkish, Ukrainian, Urdu, Uzbek, Vietnamese, and unidentified. Some of the referenced materials include more than one language.

Year of publication


Available / unavailable online

Available 15,367 35.23 %
Unavailable 28,246 64.77 %
Tagged or untagged

With keywords 16,214 37.18 %
Without keywords 27,399 62.82 %