La sfera. nautical chart - Rare book, public domain, Library of Congress scan

In verse.
Sometimes incorrectly ascribed to Gregorio's nephew, Leonardo Dati, according to Goff, citing GW.
No signatures.
LC copy has marginal color wash pen-and-ink illustrations, including astronomical, meteorological, and geographical images of the world, with portolan-like maps of the Mediterranean coastline integrated into the text.
Goff D-50
Hain 6029
Reichling 1190
GW 8016 (variations)
IGI 3320
Also available in digital form on the Library of Congress Web site.
Formerly classified: Incun. X .D23