Technolegau naturiol o fyd natur i reoli plaon
By: gan Owen T. Jones
Series: Darlith wyddoniaeth Eisteddfod Genedlaethol Cymru -- 1998
Publisher: Eisteddfod Genedlaethol Cymru
Published: 1998
Place of publication: Bro Ogwr
Language: wel
Number of pages: 32
Subjects: Pesticides
Notes: Includes bibliographical references (p. 31).