▁hem is phere ▁and ▁stored ▁in ▁libraries ▁and ▁other ▁related ▁information ▁cent ers . ▁It ▁contains ▁some ▁two ▁million ▁reference ▁materials ▁including ▁books , ▁mag az ines ▁and ▁journ als , ▁gradu ate ▁th eses , ▁reports , ▁audi ovis ual ▁materials , ▁maps ▁and ▁photograph s . ▁ ▁At ▁present , ▁the ▁S ID AL C ▁information ▁system ▁is ▁open ▁to ▁the ▁public ▁at ▁www . s idal c . net ▁( no ▁subscription ▁required ), ▁which ▁also ▁perm its ▁on - line ▁searches ▁of ▁available ▁digital ▁collections , ▁including ▁full ▁texts , ▁audi ovis ual ▁materials , ▁photograph s , ▁etc . ▁Furthermore , ▁S ID AL C ▁is ▁linked ▁to ▁other ▁information ▁systems ▁in ▁a ▁number ▁of ▁countries ▁of ▁the ▁Amer icas , ▁which ▁provide ▁st ake hold ers ▁in ▁agricult ure ▁and ▁rural ▁territ ories ▁with ▁access ▁to ▁relevant ▁information ▁and ▁knowledge . ▁ ▁S ID AL C ' s ▁provides ▁access ▁to ▁the ▁intellectual ▁capital ▁of ▁at ▁least ▁ 1 6 6 ▁national ▁institutions . ▁It ▁is ▁the ▁result ▁of ▁earlier ▁initi atives ▁aim ed ▁at ▁management ▁of ▁knowledge ▁and ▁information , ▁all ▁promoted ▁by ▁II CA , ▁such ▁as ▁the ▁Or ton ▁Comm emor ative ▁Library ▁( f ounded ▁in ▁ 1 9 4 3 ); ▁the ▁Scient ific ▁Exchange ▁Service ▁( S IC ), ▁created ▁in ▁ 1 9 5 8 ; ▁the ▁Inter - American ▁Association ▁of ▁Agricult ural ▁L ibr ari ans , ▁Document al ists ▁and ▁Information ▁Special ists ▁( A IB DA