No that is not a typo.

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References:
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Coutts Smith, J. R. "The battle of Lissa 20 july 1866." The Mariner's Mirror 51, no. 3 (1965): 265-269.

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Johnson, Robert E. "The steam ram: More dangerous to friend than foe." Naval History 2, no. 3 (1988): 49.

Kiffer, André Geraque. Naval Battle Of Lissa, 1866. Clube de Autores, 2022.

Klobas, Mark. "Quintin Barry, The Battle of Lissa 1866: How the Industrial Revolution Changed the Face of Naval Warfare by Mark Klobas." The Northern Mariner/Le marin du nord 32, no. 4 (2022): 591-592.

Pasha, Wood. "The Naval Tactics of the Future." The North American Review 141, no. 346 (1885): 267-275.

Rottauscher, Maximilian. "With Tegetthoff at Lissa: The Memoirs of an Austrian Naval Officer 1861-66." With Tegetthoff at Lissa (2010): 1-96.

Smith, Denis Mack, and Denis Mack Smith. "War, Defeat, and the Acquisition of Venice, 1866." The Making of Italy, 1796–1866 (1988): 379-396.