Tugboat Hercules
By: prepared for The San Francisco Maritime National Historic Park, The National Park Service ; prepared by Tri-Coastal Marine, Inc
Contributors: United States. National Park Service
Series: Historic structure report
Publisher: The Service
Published: 1990
Place of publication: [Denver, Colo.?]
Language: eng
Number of pages: 116
Subjects: Tugboats -- California -- San Francisco; Historic ships -- California -- San Francisco -- Conservation and restoration; San Francisco Maritime National Historical Park (Calif.)
Notes: Shipping list no.: 91-777-P

"September 1991"--P. [3] of cover

"NPS-D-1"--P. [3] of cover

Includes bibliographical references