海量图书期刊资源,随时随地畅享阅读乐趣
Notes on negative dataKarl F. Heumann · 1956
Letters to the editorJohn O'Connor; Karl F. Heumann; Harry Baum; Claire K. Schultz · 1966
Letters to the editorJessica L. Harris; Karl F. Heumann; William T. Knox · 1968
LettersHeumann, Karl F. · Journal of Chemical Education · 1958
ACS-NEWSCRANE, E. J.; HEUMANN, KARL F. · Chemical & Engineering News · 1958
Tribute to Norris RakestrawHeumann, Karl F. · Journal of Chemical Education · 1983
International Scientific Communication.Hoegberg, Erick I.; Heumann, Karl F. · Journal of Chemical Documentation · 1963
Spiral Puzzle for Organic Chemistry StudentsErdik, Ender · Journal of Chemical Education · 2003
Orbitals: Some Fiction and Some FactsAutschbach, Jochen · Journal of Chemical Education · 2012
ChemOkey: A Game To Reinforce NomenclatureKavak, Nusret · Journal of Chemical Education · 2012
Hyperconjugation: A More Coherent ApproachMullins, JosephJ. · Journal of Chemical Education · 2012
The Proper Writing of Ionic ChargesJensen, William B. · Journal of Chemical Education · 2012
What Are Elements and Compounds?Myers, Rollie J. · Journal of Chemical Education · 2012
Simple Apparatus for Vacuum FiltrationZhilin, Denis M.; Kjonaas, Richard A. · Journal of Chemical Education · 2013
A very inexpensive NMR tube washerKarimian, Khashayar · Journal of Chemical Education · 1986