筛选: Contributor sim Linn Benton Community College Library 删除限定条件 Contributor sim: Linn Benton Community College Library 创造者 Forrest Johnson 删除限定条件 创造者: Forrest Johnson Human readable type sim Open Educational Resource 删除限定条件 Human readable type sim: Open Educational Resource 语言 English 删除限定条件 语言: English