Matches in Library of Congress for { ?s ?p Closed ecological systems.. }
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- 2005280345 subject "Closed ecological systems.".
- 76528755 subject "Closed ecological systems.".
- 77504074 subject "Closed ecological systems.".
- 77609399%2F%2Fr862 subject "Closed ecological systems.".
- 78621487 subject "Closed ecological systems.".
- 81009168 subject "Closed ecological systems.".
- 82127757 subject "Closed ecological systems.".
- 82463571 subject "Closed ecological systems.".
- 88011182 subject "Closed ecological systems.".
- 93000290 subject "Closed ecological systems.".