Blister mite of apple and pear
Buckell, E.R., Venables, E.P.
Blister mite of apple and pear - Ottawa 1927 - 1-4 p. - Apple. Pear Canada Department of Agriculture. Circular No. 52 .
Blister mite of apple and pear - Ottawa 1927 - 1-4 p. - Apple. Pear Canada Department of Agriculture. Circular No. 52 .