@misc{indiciaeb2ec7d108936,
  title = {Revolving batteries and river and harbor defence. Letter from the Secretary of War, in answer to resolution of the House of 29th ultimo, transmitting letter of George Vander Heyden in relation to revolving batteries and river and harbor defences. May 7, 1862. -- Laid on the table, and ordered to be printed},
  author = {united states. congress. house and heyden, george vander and united states. war department and united states congress. house and united states. government publishing office},
  year = {1862},
  url = {https://www.loc.gov/item/2024799078/},
  note = {Source identifier: 2024799078}
}