Katherine Safford-Ramus, Jürgen Maaß, Evelyn Süss-Stepancik <br/><br/>
Contemporary Research in Adult and Lifelong Learning of Mathematics 

 -  Springer  Springer  2018 
<br/><br/><label>ISBN: </label>9783319965024 
<br/><br/><label>Source: </label>EBOOK