TY  - BOOK
AU  - Beck, D. Elden
TI  - Invertebrate zoology: laboratory workbook 
SN  - 0195539419 (pbk.)
PY  - 1968///
CY  - New York : London
PB  - Macmillan Publishing Company :;Collier Macmillan Publishers
KW  - Invertebrates
KW  - Zoology
N1  - Includes bibliographical references p. (439-444)
ER  -