Antzeko izenburuak: Encyclopaedia Britannica:
- Encyclopaedia Britannica: Volume 10 (Garrison to Halibut) /
- Encyclopaedia Britannica: Volume 10 (Garrison to Halibut) /
- Encyclopaedia Britannica: Volume 3(Baltimore to Braila) /
- Encyclopaedia Britannica: Volume 4(Brain to Casting) /
- Encyclopaedia Britannica: Volume 12 (Impatiens to Jinotega) /
- Encyclopaedia Britannica: Volume 16 (Mushroom to Ozonides) /
Gaia: Encyclopaedia Britannica
- Encyclopaedia Britannica: Volume 19 (Raynal To Sarraut) /
- Encyclopaedia Britannica: Volume 22 (Textile Vascular System) /
- Encyclopaedia Britannica: Volume 22 (Textile Vascular System) /
- Encyclopaedia Britannica: Volume 23 (Vase To Zygote) /
- Encyclopaedia Britannica: Volume 1(A to Antarah) /
- Encyclopaedia Britannica: Volume 2( Antarctica to Balpe) /
Egilea: Conventions By Encyclopaedia Britannica, Inc
- Encyclopaedia Britannica: Volume 19 (Raynal To Sarraut) /
- Encyclopaedia Britannica: Volume 22 (Textile Vascular System) /
- Encyclopaedia Britannica: Volume 22 (Textile Vascular System) /
- Encyclopaedia Britannica: Volume 23 (Vase To Zygote) /
- Encyclopaedia Britannica: Volume 1(A to Antarah) /
- Encyclopaedia Britannica: Volume 2( Antarctica to Balpe) /