Search Results       Your search for [author]Horn, Toby M. returned 1 record.           Working with DNA and bacteria in precollege science classroom. by Horn, Toby M.; Reston, VA: National Association of Biology Teachers, 1993. Subject: Microbiological laboratories -- Safety measures; DNA -- Study and teaching (Secondary); Bacteria -- Study and teaching (Secondary).          Add to Book Cart Relevance: 25.00%