Ports of entry
Subtitle: scientific concerns
By: [selected by] Abelle Mason.
Contributors: Mason, Abelle, 1929-
Publisher: Harcourt Brace Jovanovich
Published: 1986
Place of publication: San Diego
Language: eng
Number of pages: 173
Subjects: Readers -- Science.; English language -- Textbooks for foreign speakers.; Science.
Notes: Bibliography: p. 167-168.
Includes index.