TY  - BOOK
AU  - Byrd,Eldon A.
TI  - How things work: practical guide for teaching scientific and technical principles
SN  - 0134356446
AV  - Q181 .B99
U1  - 500 
PY  - 1973///]
CY  - West Nyack, N.Y.
PB  - Parker Pub. Co.
KW  - Science
KW  - Study and teaching
KW  - Local
KW  - Methodology
KW  - Technology
N1  - Includes bibliographies
ER  -