Haydon, Julie. frey50 Marine biologists / Julie Haydon. - 1st ed. - North Mankato, Minn. : Smart Apple Media, 2005. - 32 p. : ill. (some col.) ; 29 cm. - Scientists at work . - . "A+." Explores the training, tools, and working environment of a marine biologist. ISBN: 1583405402 (alk. paper) LCCN: 2003070417 Subjects--Topical Terms: Marine biology--Vocational guidanceMarine biologistsMarine biologists.Marine biology--Vocational guidance.Vocational guidance. Dewey Class. No.: j578.77023 Hay 25