Matches in Library of Congress for { ?s ?p Birth intervals.. }
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- 75900352%2F%2Fr89 alternative "Birth intervals.".
- 81142649 alternative "Birth intervals.".
- 2010053642 subject "Birth intervals.".
- 2013005569 subject "Birth intervals.".
- 76367281%2F%2Fr84 subject "Birth intervals.".
- 80152018 subject "Birth intervals.".
- 81009575 subject "Birth intervals.".
- 81117277 subject "Birth intervals.".
- 81142649 subject "Birth intervals.".
- 81196561%2F%2Fr91 subject "Birth intervals.".
- 82018435 subject "Birth intervals.".
- 83007891 subject "Birth intervals.".
- 83100082%2F%2Fr912 subject "Birth intervals.".
- 89063018 subject "Birth intervals.".
- 90980022%2F%2Fr94 subject "Birth intervals.".
- 91181430 subject "Birth intervals.".
- 93036613%2F%2Fr95 subject "Birth intervals.".
- 96140312 subject "Birth intervals.".