RAVILIOUS, KATE

Power : Ethical Debates about Resources and the Environment / Ravilious, Kate ... – Mankato, Minnesota, USA : Smart Apple Media, 2008. - 46 p., ill.; . . – 978-1-59920-096-5 : 200 tg.

PETERSEN, CHRISTINE

Alternative Energy / Petersen, Christine ... – USA : Children's Press, 2004. - 47 p.– (A True Book. . . – 0-516-22804-8 : 300 tg.

PETERSEN, CHRISTINE

Solar Power / Petersen, Christine ... – USA : Children's Press, 2004. - 47 p.– (A True Book. . . – 0-516-22807-2 : 300 tg.

PETERSEN, CHRISTINE

Wind Power / Petersen, Christine ... – USA : Children's Press, 2004. - 47 p. . . – 0-516-22809-9 : 300 p.