Relativity (Physics) -- Experiments. : Albert Einstein and relativity for kids : his life and ideas with 21 activities and thought experiments [Hoopla electronic resource] / Jerome Pohlen.
Relativity (Physics) -- Juvenile literature -- Videodiscs. : Time [(DVD) videorecording] / Disney ; produced in association with the National Science Foundation ; KCTS Seattle ; Rabbit Ears Productions ; directed by Michael Gross, Darrell Suto.
Relatos de aventura. / bidex : Historias ilustradas de aventuras / redacción, Lesley Sims.
2018
1
Relatos de aventura -- Juvenile fiction. : Sobreviví los ataques de tiburones de 1916 = I survived the shark attacks of 1916 / Lauren Tarshis ; ilustrado por Scott Dawson ; translated by Joaquín Badajoz.
2019
1
Relatos de aventura Novela. / bidex : Berto y sus buenas ideas / Magaly Rodríquez ; illustrated by Juan Carlos Pinilla Melo, and Pablo Ortega Lopez.
Relaxation Therapy -- Popular works. : Pilates for breast cancer survivors : a guide to recovery, healing, and wellness / Naomi Aaronson, Ann Marie Turo.