Education Development Center (Newton, Mass.), & Elementary Science Study (Newton, Mass.). (1974). Teacher's guide for Growing seeds: Observing and recording growth of seeds. Webster Division, McGraw Hill.

Education Development Center (Newton, Mass.), and Mass.) Elementary Science Study (Newton. Teacher's Guide for Growing Seeds: Observing and Recording Growth of Seeds. New York: Webster Division, McGraw Hill, 1974.

Education Development Center (Newton, Mass.), and Mass.) Elementary Science Study (Newton. Teacher's Guide for Growing Seeds: Observing and Recording Growth of Seeds. Webster Division, McGraw Hill, 1974.