Collings, Gilbeart H. 1895-1964.
Commercial fertilizers : their sources and use / by Gilbeart H. Collings. - 5th ed. TMH ed. - New York : McGraw-Hill, 1955. - xi, 617 p. : ill. ; 24 cm.
Includes bibliographical references and index.
54011315
Fertilizers.
S633 / .C69 1955
631.8 / COC
Commercial fertilizers : their sources and use / by Gilbeart H. Collings. - 5th ed. TMH ed. - New York : McGraw-Hill, 1955. - xi, 617 p. : ill. ; 24 cm.
Includes bibliographical references and index.
54011315
Fertilizers.
S633 / .C69 1955
631.8 / COC