photo caption page HAER No. MD-163, "Baltimore & Potomac Interlocking Tower, Adjacent to AMTRAK railroad tracks in block bounded by Howard Street, Jones Falls
ISBN 978-0-7817-3548-3. OCLC 53868338. [页码请求] Marino, Paul L. The ICU book. Baltimore: Williams & Wilkins. 1998. ISBN 978-0-683-05565-8. OCLC 300112092
and Sons: Chichester (1996). ISBN 0471955124. Eric Block, "Garlic and Other Alliums: The Lore and the Science" (Cambridge: Royal Society of Chemistry, 2010)