TY  - BOOK
AU  - Greisel,Irma
AU  - Jensch,Peter F.
ED  - Houghton Mifflin and Company
TI  - Investigating our ecosystem
T2  - Houghton Mifflin science program
SN  - 0395200962
U1  - 577 23
PY  - 1976///.
CY  - Boston: 
PB  - Houghton Mifflin, 
KW  - Ecology
KW  - Laboratory manuals
N1  - Includes index
ER  -