35537518
9786071709363
Hal Edward Runkel is the author of 'Paternidad libre de gritos / ScreamFree Parenting: El acercamiento revolucionario para educar a tus hijos, manteniendo la calma / The Revolutionary ... Kids by Keeping Your Cool (Spanish Edition)', published 2011 under ISBN 9786071709363 and ISBN 6071709369.
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