TY  - BOOK
AU  - 
AU  - Eby, George S.;Waugh, Charles L.,;Welch, Herbert E.,;Buckingham, Burdette H.,
ED  - 
ED  - 
ED  - 
ED  - 
SN  - 2
PY  - 1960///;©196046
CY  - Boston :;Boston
PB  - Ginn and Company,;Ginn and Company
KW  - 
KW  - 2
KW  - 0
KW  - 6
KW  - 20
KW  - Science
KW  - sears0
N1  - Includes bibliographies; 5
ER  -