"Ecology Popular Works." . . "Wildlife conservation Juvenile literature." . . . . "Discusses the threats to the survival of various animal species and what is being done to preserve them from extinction." . . . . . . . . . "Wildlife in danger"@en . . "Wild life in danger" . . . . "Juvenile works" . . . . "Wild life in danger, illustrated with photographs and line drawings" . . . "Zoology Popular Works." . . . .