Matches in Library of Congress for { ?s ?p Biological productivity.. }
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- 2007425451 subject "Biological productivity.".
- 2009418091 subject "Biological productivity.".
- 68099069 subject "Biological productivity.".
- 70135960 subject "Biological productivity.".
- 70153528 subject "Biological productivity.".
- 71113935 subject "Biological productivity.".
- 72339376 subject "Biological productivity.".
- 72353314 subject "Biological productivity.".
- 73012320 subject "Biological productivity.".
- 73021035%2F%2Fr862 subject "Biological productivity.".
- 73316231 subject "Biological productivity.".
- 80042231 subject "Biological productivity.".
- 81170841 subject "Biological productivity.".
- 86212673 subject "Biological productivity.".
- 89117560 subject "Biological productivity.".
- 92036737 subject "Biological productivity.".
- 98015359 subject "Biological productivity.".
- 98203194 subject "Biological productivity.".