books%3Fid=cp-lN7X3iRUC&pg=PA194&lpg=PA194&dq=alardo+popma&source=web&ots=5Q-9di5Ebd&sig=DENMd1_WjToXDWGmAfZRaV6qGfA&hl=en&sa=X&oi=book_result&resnum=8&ct=result
books%3Fid=cp-lN7X3iRUC&pg=PA194&lpg=PA194&dq=alardo+popma&source=web&ots=5Q-9di5Ebd&sig=DENMd1_WjToXDWGmAfZRaV6qGfA&hl=en&sa=X&oi=book_result&resnum=8&ct=result