21 books
Encyclopaedia Britannica; A Dictionary of Arts, Sciences, and General Literature Volume 19
Encyclopaedia Britannica; A Dictionary of Arts, Sciences, and General Literature Volume 21
Encyclopaedia Britannica; A Dictionary of Arts, Sciences, and General Literature Volume 12
Encyclopaedia Britannica; A Dictionary of Arts, Sciences, and General Literature Volume 15
The Encyclopaedia Britannica; A Dictionary of Arts, Sciences, and General Literature Volume 9
The Encyclopaedia Britannica; A Dictionary of Arts, Sciences, and General Literature Volume 2
Encyclopaedia Britannica; A Dictionary of Arts, Sciences, and General Literature Volume 3