Óíèâåðñàëüíîå îòíîøåíèå "ïèòàíèå"
Ðèñ. 4.2. Óíèâåðñàëüíîå îòíîøåíèå "Ïèòàíèå"
Ñîäåðæàíèå ðàçäåëà