by Hagedorn, Eric A, Schug, Mark C, Suiter, Mary
Published in The Journal of private enterprise (01.04.2016)

by Carrick, Tina L., Miller, Kate C., Hagedorn, Eric A., Smith-Konter, Bridget R., Velasco, Aaron A.
Published in Journal of geoscience education (01.02.2016)

by Marshall, Jill A., Hagedorn, Eric A., O’Connor, Jerry
Published in Physical review special topics. Physics education research (01.03.2009)

by Hagedorn, Eric A
Published in The Physics teacher (01.12.2006)

by Schug, Mark C., Hagedorn, Eric A.
Published in Social studies (Philadelphia, Pa : 1934) (01.01.2006)

by Schug, Mark C, Hagedorn, Eric A
Published in Social studies (Philadelphia, Pa. : 1953) (01.03.2006)

by Schug, Mark C, Hagedorn, Eric A
Published in Social studies (Philadelphia, Pa : 1934) (01.03.2005)

by Schug, Mark C, Hagedorn, Eric A
Published in Social studies (Philadelphia, Pa. : 1953) (01.03.2005)

by Schug, Mark C, Hagedorn, Eric A
Published in The Journal of private enterprise (01.10.2004)

by Jill A. Marshall, Eric A. Hagedorn, Jerry O’Connor
Published in Physical review special topics. Physics education research (01.03.2009)