Bibliography of Marx, Robert F., by subject:

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•	Underwater archaeology (5)
•	Treasure-trove (3)
•	America -- Antiquities (2)
•	Deep diving -- History (2)
•	Amazon.com -- History -- World -- Transportation -- Ships -- Ships & Shipwrecks (2)
•	Marx, Robert F.,1933 (2)
•	Underwater exploration (2)
•	Shipwrecks -- Directories (2)
•	Amazon.com -- Reference -- General (2)
•	Treasure-trove -- United States (2)
•	Amazon.com -- Nonfiction -- Transportation -- Ships -- History (2)
•	Amazon.com -- History -- World -- Transportation -- Ships -- General (2)
•	Amazon.com -- Nonfiction -- Social Sciences -- Archaeology (2)
•	Sports -- Water Sports -- Scuba -- General (2)
•	Travel -- Specialty Travel -- Adventure -- Scuba (2)
•	Treasure troves (2)
•	Mouth -- Surgery (2)
•	Shipwrecks -- America -- History -- Chronology (2)
•	Underwater exploration -- History (2)
•	Professional & Technical -- Business Management -- Organizational Behavior (1)

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