Chemical demonstrations :
Summerlin, Lee R.,
Chemical demonstrations : A sourcebook for teachers / Lee r. summerlin, christie l. borgford, julie b. ealy - 2 - volúmenes
V.2 by lee r. summerlin, christie l. borgford and julie b ealy
0841215359
Química--Experimentos
QD43 / S85 1988
Chemical demonstrations : A sourcebook for teachers / Lee r. summerlin, christie l. borgford, julie b. ealy - 2 - volúmenes
V.2 by lee r. summerlin, christie l. borgford and julie b ealy
0841215359
Química--Experimentos
QD43 / S85 1988