BOOKS - NATURAL SCIENCES - Изучаем водоемы как исследоват...
US $8.68
119492
119492
Изучаем водоемы как исследовать озера и пруды
Author: Коробейникова А.А., Воробьев Г.А. (ред.)
Year: 1994
Format: PDF/DJVU
File size: 11 MB
Language: RU
Year: 1994
Format: PDF/DJVU
File size: 11 MB
Language: RU
The book was written for middle-aged and older schoolchildren as a manual for performing a number of environmental tasks and conservation work during summer environmental practices. Its main goal is to show a system for studying the natural ecosystems of water bodies and on the example of the living conditions of aquatic organisms, to help reveal the relationships in nature.