1. A peek into the nest of the Bee-eater Merops apiaster;Ben-David;The Torgos,1989
2. Respiratory gas concentrations and temperatures within the burrows of three species of burrow-nesting birds;Birchard;Wilson Bull.,1984
3. The Bee-eaters;Fry,1984
4. Fundamentals of Soil Physics;Hillel,1980
5. Advantages and disadvantages of Bank swallow (Riparia riparia) coloniality;Hoogland;Ecol. Monogr.,1976