Alan Gregg, pseud. of Gertrude E. Mallette, illustrator: Grattan Condon.
Flying wing mystery.
R615802. Flying wing mystery. By Alan Gregg, pseud. of Gertrude E. Mallette, illustrator: Grattan Condon. © 23Sep48; A25652. Gertruda E. Mallette (A); 9Oct75; R615802.
Gertruda E. Mallette|A