by Varrella, Gary F, Luckey, Brian P, Baca, Jacqueline S, Peters, Curt
Published in Journal of extension (01.10.2016)

by Varrella, Gary F.
Published in The Clearing house (01.09.2000)

by Varrella, Gary F., Veronesi, Peter D.
Published in Journal of elementary science education (01.10.2004)

by Varrella, Gary F., Veronesi, Peter D.
Published in Journal of elementary science education (01.10.2004)

by Varrella, Gary F.
Published in Science activities (01.09.1994)

by Burry-Stock, J. A, Dorogan, L, Varrella, G. F, Yager, R. E
Published in International journal of science education (01.04.2000)

by Veronesi, Peter D, Varrella, Gary F
Year of Publication 1999

by Varrella, Gary F, Burry-Stock, Judith
Year of Publication 01.11.1996

by Varrella, Gary F, Haas, Brenda, Castle, Tom, Toadvine, Wendy, Washburn, Donald, Jr, Mays, David W
Year of Publication 1999