Hibbard, R.P. <br/><br/>
The physiological effect of ethylene gas upon celery, tomatoes, and certain fruits / 
R.P. Hibbard 
 - Michigan :  S.a.,  1930. 
 - 30 p.:  tables, fig.,  23 cm. 
 - Technical Bulletin  No. 104 Agricultural experiment station Michigan State college of agriculture and applied science .
<br/><br/>Bibliography : p. 30 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plant protection