Wahlgren, H.E.  <br/><br/>
Properties of 50 individual Philippine hardwood barks and mixture of 22 Ghanaian and 18 Colombian hardwood barks  (Book) 

 - Madison, Wisconsin  United States Department of Agriculture  1977 
 - 12:12 A12-P12  26 cm. 
<br/><br/><label>Universal Decimal Class. No.: </label>691 . 112 (6+ 86+ 914) WAH  / 15130