Notice: Undefined offset: 1 in /home/i/ilopat/shpore/public_html/schoolbooks.php on line 42 Warning: Cannot modify header information - headers already sent by (output started at /home/i/ilopat/shpore/public_html/schoolbooks.php:42) in /home/i/ilopat/shpore/public_html/schoolbooks.php on line 45 Е.В. Коршак, А.И. Ляшенко, В.Ф Савченко